| k times continuously differentiable function | NQNSQ16REA | unknown | open | Wikidata Q11855366, MathWorld C-kFunction |
| k-edge-connected graph | WR0VJX2BY6 | unknown | open | Wikidata Q3034655, MathWorld k-Edge-ConnectedGraph |
| k-factor | BVW19RCJG0 | unknown | open | Wikidata Q130377973, MathWorld k-Factor |
| K-function | TTYKG638VN | unknown | open | Wikidata Q1541649, MathWorld K-Function |
| K-homology | A13X7CKT37 | topic | open | Wikidata Q6322838, nLab K-homology |
| K-matrix | KHM159V1BX | concept | open | Wikidata Q110571086, MathWorld k-Matrix |
| K-statistic | 392X2J7ARH | unknown | open | Wikidata Q16860715, MathWorld k-Statistic |
| k-subset | P2VHADN6KG | unknown | open | Wikidata Q141500538, MathWorld k-Subset |
| K-theory | TJ88BB7PT7 | topic | open | Wikidata Q15615154, MathWorld K-Theory, nLab K-theory, ProofWiki Definition:K-Theory |
| K-theory spectrum | R87165X8VD | unknown | open | Wikidata Q16909784, nLab K-theory spectrum |
| K-topology | SJ4SHBAR7J | unknown | open | Wikidata Q6322883, nLab K-topology |
| k-tree | 4RGSSFMQG3 | unknown | open | Wikidata Q12027616, MathWorld k-Tree |
| k-vertex-connected graph | TQ3H4STQ80 | unknown | open | Wikidata Q3115621, MathWorld k-ConnectedGraph |
| K/k | VSJJME4HAN | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q9922, ProofWiki Symbols:K |
| K3 surface | 3VQ311F6SK | concept | open | Wikidata Q1969721, nLab K3 surface |
| Kac Matrix | PQM3J4JH73 | concept | open | Wikidata Q105332766, MathWorld KacMatrix |
| Kac–Moody algebra | M9RY7F41DZ | unknown | open | Wikidata Q856666, EoM Kac-Moody_algebra, nLab Kac-Moody algebra |
| Kadomtsev–Petviashvili equation | 3BCANXERSY | unknown | open | Wikidata Q6345653, MathWorld Kadomtsev-PetviashviliEquation |
| Kai Behrend | H59P6MZRQA | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2815216, nLab Kai Behrend |
| Kakeya needle problem | P08QJMKG3P | problem | open | Wikidata Q3406254, MathWorld KakeyaNeedleProblem, MathWorld KakeyaSet |
| Kalb–Ramond field | NHNGSFZ3E9 | unknown | open | Wikidata Q2268203, nLab Kalb-Ramond field |
| Kalman filter | AXBCY1XYP9 | unknown | open | Wikidata Q846780, MathWorld KalmanFilter |
| Kaluza–Klein theory | 3EM60DQX3Y | unknown | open | Wikidata Q944095, nLab Kaluza-Klein mechanism |
| Kampyle of Eudoxus | Y8N796K2QS | unknown | open | Wikidata Q1151489, MathWorld KampyleofEudoxus |
| Kampé de Fériet function | KSM9XR2PRG | concept | open | Wikidata Q6359557, MathWorld KampedeFerietFunction |
| Kan complex | KYBG8C12GM | unknown | open | Wikidata Q109012778, nLab Kan complex |
| Kan extension | TZ6HJT4WPZ | unknown | open | Wikidata Q1723418, nLab Kan extension |
| Kan fibration | BECDC4WBGP | unknown | open | Wikidata Q3915873, nLab Kan fibration |
| Kanizsa triangle | ZCW3XWQR1S | unknown | open | Wikidata Q3325180, MathWorld KanizsaTriangle |
| Kantaro Ohmori | D2CAJ67CX2 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q60168178, nLab Kantaro Ohmori |
| Kantorovich inequality | P6YDNWB7F1 | statement | open | Wikidata Q3154001, MathWorld KantorovichInequality |
| Kantor–Koecher–Tits construction | 3WVVJB4Q9B | unknown | open | Wikidata Q6365576, nLab Kantor-Koecher-Tits construction |
| Kan–Thurston theorem | SYGGRR3TA1 | statement | open | Wikidata Q96385278, nLab Kan-Thurston theorem |
| kaon | VJG231YHJT | unknown | open | Wikidata Q843503, nLab kaon |
| Kaplan–Yorke conjecture | VDQHDBFCAS | concept | open | Wikidata Q25303693, MathWorld Kaplan-YorkeConjecture |
| Kaplan–Yorke map | HAA6RAPGW8 | unknown | open | Wikidata Q6366845, MathWorld Kaplan-YorkeMap |
| kappa | VA0GEBZ34Y | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14401, ProofWiki Symbols:Greek/Kappa |
| Kappa curve | NZ9SMD3KGV | unknown | open | Wikidata Q2252430, MathWorld KappaCurve |
| Kaprekar algorithm | J5YNW07BDR | unknown | open | Wikidata Q18413622, MathWorld KaprekarRoutine |
| Kaprekar number | PDM92SGSX2 | concept | open | Wikidata Q1478274, MathWorld KaprekarNumber |
| Kaprekar's constant | GB2882TD1J | unknown | open | Wikidata Q854503, MathWorld KaprekarsConstant |
| Kapteyn series | 9VECWVAPWM | concept | open | Wikidata Q105555735, MathWorld KapteynSeries |
| Karatsuba algorithm | F4DANA5A65 | unknown | open | Wikidata Q629940, MathWorld KaratsubaMultiplication |
| Karel Lambert | BFAZ7SZRPX | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q6369330, nLab Karel Lambert |
| Karen Uhlenbeck | FTEHA40PAS | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q38636, nLab Karen Uhlenbeck |
| Kari Vilonen | FBSCJEFRQ0 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q15454216, nLab Kari Vilonen |
| Karl Pearson | Q6ZAB22RSV | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q310794, EoM Pearson,_Karl |
| Karl Popper | DTWYB8FMVE | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q81244, nLab Karl Popper |
| Karl Rosenkranz | VXT4EN0VQR | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q62315, nLab Karl Rosenkranz |
| Karl Stein | A74H40CWYK | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q68536, nLab Karl Stein |
| Karl Weierstraß | XX1GCV17FW | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q57103, nLab Karl Weierstraß, ProofWiki Mathematician:Karl_Theodor_Wilhelm_Weierstrass |
| Karnaugh map | 2GMAHPH43K | unknown | open | Wikidata Q461528, EoM Karnaugh_map, MathWorld KarnaughMap |
| Karol Borsuk | 8G7EFC31VW | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q469088, nLab Karol Borsuk |
| Karoubi envelope | AQ4R12WE26 | unknown | open | Wikidata Q3055409, nLab Karoubi envelope |
| Kasper Peeters | PWX2PM450C | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q62066525, nLab Kasper Peeters |
| Katarzyna Rejzner | MVHPV2P0GW | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q62066729, nLab Katarzyna Rejzner |
| Katrin Wehrheim | YBDHZAY8F1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q6377892, nLab Katrin Wehrheim |
| Katrin Wendland | N5S1CSK0H1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1736765, nLab Katrin Wendland |
| Katsumi Nomizu | 273HX721NC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1995996, nLab Katsumi Nomizu |
| Katydid sequence | RFPMHZ4NE4 | object | open | Wikidata Q6378559, OEIS A060031 |
| Kauffman polynomial | Q9ZHTVS374 | unknown | open | Wikidata Q6378674, MathWorld KauffmanPolynomialF |
| Kaup–Kupershmidt equation | XYCQPCAWRY | concept | open | Wikidata Q6378865, MathWorld KupershmidtEquation |
| Kawasaki's theorem | X76SY7A05Q | statement | open | Wikidata Q6379715, MathWorld KawasakisTheorem |
| Kazimierz Kuratowski | 2DH5M5RQFK | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q161846, nLab Kazimierz Kuratowski |
| Kazuya Kato | ZQMRWPJZS3 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q333000, nLab Kazuya Kato |
| Kefeng Liu | RXYVMQE9T0 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q6383408, nLab Kefeng Liu |
| Keith Conrad | G538MF46AJ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q6384220, nLab Keith Conrad |
| Keith Dienes | FJT2DV1BB1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q105604472, nLab Keith Dienes |
| Keith number | 26DKHZHD0Q | unknown | open | Wikidata Q378067, MathWorld KeithNumber, OEIS A007629 |
| Keller's conjecture | 97TE3M6AQ5 | conjecture | open | Wikidata Q4802474, MathWorld KellersConjecture |
| kelvin | BVCMRZX2Q7 | definition | open | Wikidata Q11579, ProofWiki Definition:Kelvin |
| Kelvin conjecture | RJ9F3YS3G1 | conjecture | open | Wikidata Q2993320, MathWorld KelvinsConjecture |
| Kelvin functions | YSFVEMJHYE | unknown | open | Wikidata Q4493413, MathWorld KelvinFunctions |
| Kempe chain | PHD8NM80N6 | concept | open | Wikidata Q6387048, MathWorld KempeChain |
| Kempner function | 3D1RJNG34D | unknown | open | Wikidata Q1414564, MathWorld SmarandacheFunction, OEIS A002034 |
| Kempner number | 35ZH6J26D3 | object | open | Wikidata Q138028016, OEIS A007404 |
| Kempner series | 1G1MJZYJ6S | unknown | open | Wikidata Q928481, MathWorld KempnerSeries |
| Ken Ono | SKSMEPMD27 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1738659, nLab Ken Ono |
| Kenji Fukaya | QV1RRYC1DT | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q3182153, nLab Kenji Fukaya |
| Kenji Ueno | AB54QNG2YF | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q4121026, nLab Kenji Ueno |
| Kenkichi Iwasawa | ESSXEVMNF8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q933692, nLab Kenkichi Iwasawa |
| Kenmotu point | 862XKVH0F6 | unknown | open | Wikidata Q130214553, MathWorld KenmotuPoint |
| Kenneth Arthur Intriligator | FCBVV4WYFN | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q102436557, nLab Kenneth Intriligator |
| Kenneth Brown | X2AYTAEK4V | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q15994957, nLab Kenneth Brown |
| Kenneth E. Iverson | 1Z2P3PNJSS | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q92629, ProofWiki Mathematician:Kenneth_Eugene_Iverson |
| Kenneth Kunen | 1Q0Y3NPQ8T | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q782431, nLab Kenneth Kunen |
| Kenneth Ribet | FS7Z0NWSES | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q535655, nLab Ken Ribet |
| Kentarō Hori | 5T0D3KADKE | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q18603796, nLab Kentaro Hori |
| Kepler conjecture | Q6CAT961AA | problem | open | Wikidata Q966873, MathWorld KeplerConjecture |
| Kepler triangle | 7HMHR09Z7Q | unknown | open | Wikidata Q2222878, MathWorld KeplerTriangle |
| Kepler's equation | GV1R03RRX3 | unknown | open | Wikidata Q932001, MathWorld KeplersEquation |
| Kepler's first law | JR042DWVKK | statement | open | Wikidata Q122928282, ProofWiki Kepler's_Laws_of_Planetary_Motion/First_Law |
| Kepler's laws of planetary motion | 9PT6P1TYB6 | statement | open | Wikidata Q83219, ProofWiki Kepler's_Laws_of_Planetary_Motion |
| Kepler's second law | GP7JSSS6E8 | statement | open | Wikidata Q122928303, ProofWiki Kepler's_Laws_of_Planetary_Motion/Second_Law |
| Kepler's third law | CAVWC5A5BZ | statement | open | Wikidata Q122928319, ProofWiki Kepler's_Laws_of_Planetary_Motion/Third_Law |
| Kepler–Bouwkamp constant | F0KZ62KWN0 | object | open | Wikidata Q6393212, MathWorld PolygonInscribing, OEIS A085365 |
| Kepler–Poinsot polyhedron | 10A6A3ZQB1 | concept | open | Wikidata Q1023978, MathWorld Kepler-PoinsotPolyhedron |
| kernel | 1RGXAB8ZJN | unknown | open | Wikidata Q2914509, MathWorld Kernel, Wikidata Q574844, EoM Kernel_of_a_matrix |
| kernel | RPSV5P9ME9 | unknown | open | Wikidata Q2920416, nLab kernel |
| kernel of integral operator | GVFJN93H09 | unknown | open | Wikidata Q4536341, MathWorld IntegralKernel |
| Kervaire invariant | V1TPJV9AJW | unknown | open | Wikidata Q6394805, nLab Kervaire invariant |
| Kevin Buzzard | N4A4D9BWVD | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1740098, nLab Kevin Buzzard |
| Kevin Costello | ZHTQ0JFMBA | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q17198085, nLab Kevin Costello |
| Kevin Iga | PF4HHHAJFK | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q59753345, nLab Kevin Iga |
| Khandakhadyaka | KSNTRG3BFB | unknown | out_of_scope (a book, not an item of mathematics) | Wikidata Q19542993, ProofWiki Book:Brahmagupta/Khandakhadyaka |
| Khinchin's constant | 3Z215HY82J | object | open | Wikidata Q2718188, MathWorld KhinchinsConstant, OEIS A002210 |
| Khinchin's theorem on the factorization of distributions | 3P572VJ534 | statement | open | Wikidata Q28403771, EoM Khinchin_theorem |
| Khovanov homology | 1DPXX57TRE | unknown | open | Wikidata Q6402652, nLab Khovanov homology |
| kibibyte | 2HD2Z9D251 | unknown | open | Wikidata Q79756, MathWorld Kibibyte |
| Kiepert conics | MEB8VWS97E | unknown | open | Wikidata Q111165553, MathWorld KiepertParabola |
| Kiepert hyperbola | 45FJ5QEAE0 | unknown | open | Wikidata Q113502, MathWorld KiepertHyperbola |
| Kiiti Morita | MZ2BVQHDPY | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q454583, nLab Kiiti Morita |
| Killing form | 9BV2K1KE61 | unknown | open | Wikidata Q634557, MathWorld KillingForm, nLab Killing form |
| Killing spinor | FE0KZNDRFX | unknown | open | Wikidata Q6407805, nLab Killing spinor |
| Killing tensor | EEFH10V0WN | unknown | open | Wikidata Q6407804, nLab Killing tensor |
| Killing vector field | AKHQVRNC1Q | definition | open | Wikidata Q1200279, MathWorld KillingVectors, nLab Killing vector field, ProofWiki Definition:Killing_Vector_Field |
| kilo | BD2NFKBYZ0 | definition | open | Wikidata Q107428, ProofWiki Definition:Metric_System/Scaling_Prefixes/kilo- |
| kilobyte | V0HMPKEJH1 | unknown | open | Wikidata Q79726, MathWorld Kilobyte |
| kilogram | GC4M1PJFDH | definition | open | Wikidata Q11570, nLab kilogram, ProofWiki Definition:Metric_System/Mass/Kilogram |
| kilogram-force | WP8VKZJGN0 | definition | open | Wikidata Q216880, ProofWiki Definition:SI/Force/Kilogram_Force |
| kilogram-force per square centimetre | 5F3AJ3QMH9 | definition | open | Wikidata Q13582667, ProofWiki Definition:Kilogram_Force_per_Square_Centimetre |
| kilojoule | TCNW4FFHKB | definition | open | Wikidata Q4989854, ProofWiki Definition:SI/Energy/Kilojoule |
| kilometre | 9YH67X4S7D | definition | open | Wikidata Q828224, ProofWiki Definition:Metric_System/Length/Kilometre |
| kilowatt | 3VRBTQ0RTA | definition | open | Wikidata Q3320608, ProofWiki Definition:SI/Power/Kilowatt |
| kilowatt-hour | 1990TMVB0R | definition | open | Wikidata Q182098, ProofWiki Definition:SI/Energy/Kilowatt-Hour |
| kinematics | M0C57E6MF0 | topic | open | Wikidata Q11476 |
| kinetic energy | JS15HN9QGS | definition | open | Wikidata Q46276, ProofWiki Definition:Kinetic_Energy |
| kinetic theory | RJTWYG1YKR | topic | open | Wikidata Q200286 |
| king | MBTPM67ZPR | definition | open | Wikidata Q138, ProofWiki Definition:Chess/Piece/King |
| king's graph | ARWJ8WSRSZ | unknown | open | Wikidata Q6411145, MathWorld KingGraph |
| Kinoshita–Terasaka knot | 5NTB9B3G8Y | unknown | open | Wikidata Q94827585, MathWorld Kinoshita-TerasakaKnot |
| Kip S. Thorne | 41NTSGQZKT | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q323320, nLab Kip Thorne |
| Kirby calculus | QMMCVJ6RT6 | unknown | open | Wikidata Q5956316, nLab Kirby calculus |
| Kirchhoff's circuit laws | 9MWJKX7TQM | unknown | open | Wikidata Q187672, nLab Kirchhoff's laws |
| Kirkman's schoolgirl problem | ZWYA9XJVQ0 | problem | open | Wikidata Q966333, MathWorld KirkmansSchoolgirlProblem |
| kissing number problem | AC3TKGFPT0 | problem | open | Wikidata Q1371530, MathWorld KissingNumber |
| Kit Yates | DBRFVZ3YQJ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q112547007, ProofWiki Mathematician:Christian_Yates |
| kite | FDS819NAT5 | unknown | open | Wikidata Q107061, MathWorld Kite |
| kite graph | F4CFWYFMFG | unknown | open | Wikidata Q3115458, House of Graphs 782, MathWorld KiteGraph |
| Kittell graph | H1GRMSMMJZ | unknown | open | Wikidata Q3115505, House of Graphs 1194, MathWorld KittellGraph |
| Kiyoshi Igusa | AYY6X2G7QQ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q71192128, nLab Kiyoshi Igusa |
| KK-theory | 3VYGM8NXC1 | unknown | open | Wikidata Q6331703, nLab KK-theory |
| Klaus Fredenhagen | WKC6P7VPP8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1745095, nLab Klaus Fredenhagen |
| Klaus Heiner Kamps | YMNP3MEZHP | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q64017153, nLab Klaus Heiner Kamps |
| Klaus Hepp | G9VXQAQ2Q9 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q122764, nLab Klaus Hepp |
| Klaus Lamotke | M8XJD20Z6V | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1745383, nLab Klaus Lamotke |
| Kleene algebra | V5R4FY4Q3E | concept | open | Wikidata Q2634506, nLab Kleene algebra |
| Kleene's recursion theorem | V4XWHVTZV5 | statement | open | Wikidata Q1933521, MathWorld KleenesRecursionTheorem |
| Klein bottle | 6EX6YT9CJB | unknown | open | Wikidata Q23638, MathWorld KleinBottle, nLab Klein bottle |
| Klein Bottle Dissection | HC0EKMHKTX | unknown | open | Wikidata Q97621538, MathWorld KleinBottleDissection |
| Klein four-group | PXT19RN2NY | concept | open | Wikidata Q550593, MathWorld FiniteGroupC2xC2, MathWorld KleinFour-Group, MathWorld Vierergruppe, nLab Klein four-group, ProofWiki Definition:Klein_Four-Group |
| Klein geometry | BBG3WPX2JA | unknown | open | Wikidata Q2132698, nLab Klein geometry |
| Klein graph on 24 vertices | XY8YDVFHT0 | unknown | open | Wikidata Q8152995, House of Graphs 1198, MathWorld KleinGraph |
| Klein graph on 56 vertices | VFPEHAABN8 | unknown | open | Wikidata Q8152814, House of Graphs 36660 |
| Klein quadric | H2EW2DS887 | unknown | open | Wikidata Q6420195, nLab Klein quadric |
| Klein quartic | WZHDM9XXQZ | unknown | open | Wikidata Q977499, MathWorld KleinQuartic |
| Kleinian group | VNRMNSFAZ4 | concept | open | Wikidata Q4116484, MathWorld KleinianGroup, nLab Kleinian group |
| Klein–Gordon equation | FGQ6ZH1KJK | unknown | open | Wikidata Q868967, MathWorld Klein-GordonEquation |
| Kleisli category | HNB6X8PW00 | unknown | open | Wikidata Q1773982, nLab Kleisli category |
| Kloosterman sum | AVWTBHP1H6 | concept | open | Wikidata Q6421354, MathWorld KloostermansSum |
| KMS state | G5YT12CHVZ | unknown | open | Wikidata Q3591812, nLab KMS state |
| knapsack problem | XQA9YFTHY2 | unknown | open | Wikidata Q864457, MathWorld KnapsackProblem |
| Kneser graph | 2FCPX1W98H | unknown | open | Wikidata Q733004, MathWorld KneserGraph |
| knight | N2Q3RF47XQ | definition | open | Wikidata Q136, ProofWiki Definition:Chess/Piece/Knight |
| knight's graph | AA2NA0ZWNF | unknown | open | Wikidata Q6422173, MathWorld KnightGraph |
| knight's tour | FD6EPZCNAE | definition | open | Wikidata Q12524, MathWorld KnightsTour, OEIS A001230, ProofWiki Definition:Knight's_Tour |
| Knizhnik–Zamolodchikov equations | D7KBCKMZMH | unknown | open | Wikidata Q6422663, nLab Knizhnik-Zamolodchikov equation |
| knot | FWH1RRV0W9 | definition | open | Wikidata Q128822, ProofWiki Definition:Knot_(Unit_of_Measurement) |
| knot complement | DTGJAPGMV3 | unknown | open | Wikidata Q2017498, MathWorld KnotComplement, nLab knot complement |
| knot group | KJWK68R937 | unknown | open | Wikidata Q1777486, MathWorld KnotGroup, nLab knot group |
| knot invariant | XRSE497TQ4 | unknown | open | Wikidata Q1862434, MathWorld KnotInvariant, nLab knot invariant |
| knot polynomial | XKFBDRV55H | unknown | open | Wikidata Q2228072, MathWorld KnotPolynomial |
| knot sum | 494Z52NXR3 | unknown | open | Wikidata Q91779227, MathWorld KnotSum |
| knot theory | 9YP24HXQKF | topic | open | Wikidata Q849798, MathWorld KnotTheory, ProofWiki Definition:Knot_Theory |
| Knowledge | 6QKXGHQ8DP | unknown | out_of_scope (a book, not an item of mathematics) | Wikidata Q96721696, ProofWiki Book:Journal/Knowledge |
| Knuth's up-arrow notation | 8B31VA6FHZ | unknown | open | Wikidata Q908427, MathWorld KnuthUp-ArrowNotation |
| Knuth–Bendix completion algorithm | S08GEE803D | unknown | open | Wikidata Q2835803, MathWorld Knuth-BendixCompletionAlgorithm |
| Knödel number | FVY7EY45RB | unknown | open | Wikidata Q4346700, MathWorld KnoedelNumbers |
| Ko Sanders | QFY38DEFMH | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q57954021, nLab Ko Sanders |
| Kobayashi–Hitchin correspondence | F8HQP33F4K | unknown | open | Wikidata Q6424285, nLab Kobayashi-Hitchin correspondence |
| kobon triangle problem | H71SCXM6GP | problem | open | Wikidata Q1269124, MathWorld KobonTriangle |
| Koch snowflake | B717QDCGT1 | unknown | open | Wikidata Q223137, MathWorld KochSnowflake |
| Kochański's approximation | RTQ4WN5TGF | unknown | open | Wikidata Q2006381, MathWorld KochanskisApproximation |
| Kochen–Specker theorem | AS7FYH20VD | unknown | open | Wikidata Q528955, nLab Kochen-Specker theorem |
| Kodaira embedding theorem | JJ6WC8TQZP | statement | open | Wikidata Q6425088, MathWorld KodairaEmbeddingTheorem, nLab Kodaira embedding theorem |
| Kodaira vanishing theorem | F2XCJMXY07 | statement | open | Wikidata Q2518048, nLab Kodaira vanishing theorem |
| Kolakoski sequence | WP4G7A16HP | object | open | Wikidata Q6427013, MathWorld KolakoskiSequence, OEIS A000002 |
| Kolmogorov complexity | M5M6MN6956 | concept | open | Wikidata Q1456811, nLab Kolmogorov complexity |
| Kolmogorov duality | J64VFAAXFV | unknown | open | Wikidata Q4155849, EoM Kolmogorov_duality |
| Kolmogorov space | DR1JW8MVXT | definition | open | Wikidata Q1148924, ProofWiki Definition:Kolmogorov_Space |
| Kolmogorov–Arnold–Moser theorem | EXRRKQGDZK | statement | open | Wikidata Q587081, MathWorld Kolmogorov-Arnold-MoserTheorem |
| Komornik–Loreti constant | 7VZAVJATWY | object | open | Wikidata Q6428513, OEIS A055060 |
| Konrad Osterwalder | KK23J3XGDJ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q125728, nLab Konrad Osterwalder |
| Konrad Zuse | BNH7N7KFD9 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q60093, nLab Konrad Zuse |
| Konstantinos Carathéodory | 645MQGDQJX | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q65332, nLab Constantin Carathéodory, ProofWiki Mathematician:Constantin_Carathéodory |
| Korteweg–De Vries equation | 5S101A4MBX | concept | open | Wikidata Q601796, EoM Korteweg-de_Vries_equation, MathWorld Korteweg-deVriesEquation |
| Kosnita Point | 6KNKRHEA7D | unknown | open | Wikidata Q1785070, MathWorld KosnitaPoint |
| Kosnita's theorem | FS5PQAXC9Q | statement | open | Wikidata Q18207105, MathWorld KosnitaTheorem |
| Kostas Skenderis | 1NTPMGDEV6 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q91825807, nLab Kostas Skenderis |
| Koszul algebra | 9KR9SK00NG | concept | open | Wikidata Q6433697, nLab Koszul algebra |
| Koszul complex | 4BFH93V9NY | concept | open | Wikidata Q6433699, EoM Koszul_complex, nLab Koszul complex |
| Koszul duality | KZ9WDFHSK0 | concept | open | Wikidata Q16981474, nLab Koszul duality |
| Koszul–Tate resolution | T1HPTYBV7Z | concept | open | Wikidata Q6433700, nLab Koszul-Tate resolution |
| KR-theory | RVTBN2YC4P | unknown | open | Wikidata Q6336464, nLab KR cohomology theory |
| Krackhardt kite graph | A5ZF85B6H5 | unknown | open | Wikidata Q25099509, House of Graphs 1200, MathWorld KrackhardtKite |
| Kravchuk polynomials | ZCYSKHBE7N | concept | open | Wikidata Q4298931, EoM Krawtchouk_polynomials, MathWorld KrawtchoukPolynomial |
| Kronecker delta | TGXYDT8QWE | concept | open | Wikidata Q192826, MathWorld KroneckerDelta, nLab Kronecker delta |
| Kronecker product | V4R9DR3R6F | concept | open | Wikidata Q1238125, MathWorld KroneckerProduct |
| Kronecker symbol | HQ496ARRNB | concept | open | Wikidata Q1789847, MathWorld KroneckerSymbol |
| Kronecker symbol (-1, n) except a(0) = 0. | TGHG724TQ7 | object | open | Wikidata Q100193944, OEIS A112347 |
| Kronecker's method | Z94MBE47NY | concept | open | Wikidata Q20877540, EoM Kronecker_method, MathWorld KroneckersAlgorithm |
| Kronecker–Weber theorem | 9Q68BNDW02 | statement | open | Wikidata Q1369453, nLab Kronecker-Weber theorem |
| Krull dimension | 85YCMNGG67 | definition | open | Wikidata Q1225713, MathWorld KrullDimension, ProofWiki Definition:Krull_Dimension |
| Krull ring | P3NMCQSVKD | concept | open | Wikidata Q623257, EoM Krull_ring |
| Kruskal's tree theorem | S7SYQ11ZWB | statement | open | Wikidata Q3527100, MathWorld KruskalsTreeTheorem |
| Kruskal–Szekeres coordinates | 1M0ZZ4B4ZF | unknown | open | Wikidata Q1478885, nLab Kruskal–Szekeres coordinates |
| krypton | 1EDB31BFGY | definition | open | Wikidata Q888, ProofWiki Definition:Krypton |
| krypton-82 | S20KRS3KJG | definition | open | Wikidata Q2558547, ProofWiki Definition:Krypton/82 |
| krypton-83 | AG6RBP98ZK | definition | open | Wikidata Q1921298, ProofWiki Definition:Krypton/83 |
| krypton-84 | H1VGK2J2TG | definition | open | Wikidata Q2163590, ProofWiki Definition:Krypton/84 |
| krypton-86 | XXSGD41VH7 | definition | open | Wikidata Q2195058, ProofWiki Definition:Krypton/86 |
| Krzysztof Galicki | 52EHE9R0DQ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q48844370, nLab Krzysztof Galicki |
| Krzysztof Gawedzki | 7R5Q1FS3HF | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1689580, nLab Krzysztof Gawedzki |
| Kuen surface | RT0Y0PWGPB | unknown | open | Wikidata Q133575363, MathWorld KuenSurface |
| Kuiper's theorem | CHQQMTRAYP | statement | open | Wikidata Q6442276, nLab Kuiper's theorem |
| Kullback–Leibler divergence | 47VBHYHHT5 | unknown | open | Wikidata Q255166, MathWorld RelativeEntropy |
| Kummer graph | 86WEBZQ1GX | unknown | open | Wikidata Q3115512, House of Graphs 1206, MathWorld KummerGraph |
| Kummer surface | 879B540W7M | concept | open | Wikidata Q1494636, MathWorld KummerSurface |
| Kummer theory | 9CHE3TN13Z | topic | open | Wikidata Q1548483, nLab Kummer theory, ProofWiki Definition:Kummer_Theory |
| Kummer's test | WJ9XQJQ14D | statement | open | Wikidata Q736383, MathWorld KummersTest |
| Kunihiko Kodaira | RMKBX4HFR7 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q333918, nLab Kunihiko Kodaira, ProofWiki Mathematician:Kunihiko_Kodaira |
| Kuno Lorenz | WN60HV39DZ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q88045, nLab Kuno Lorenz |
| Kuo-Tsai Chen | TQWAG43WXF | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q15444532, nLab Kuo Tsai Chen |
| Kurt Gödel | 5PS3YAAWFN | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q41390, nLab Kurt Gödel |
| Kurt Hensel | ZVR4C23E7N | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q61756, nLab Kurt Hensel |
| Kurt Lechner | 2SNMVNE8BY | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q78196, nLab Kurt Lechner |
| Kurt Otto Friedrichs | GWFWYZRPNV | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q72978, nLab Kurt Otto Friedrichs |
| Kurt Reidemeister | CHD365BQX1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q65221, nLab Kurt Reidemeister |
| Kurt Symanzik | 8GMB67GGTK | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q70502, nLab Kurt Symanzik |
| kurtosis | AWMGA65MGY | unknown | open | Wikidata Q287251, MathWorld Kurtosis |
| Ky Fan | 5V0B1EXB8A | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q330103, ProofWiki Mathematician:Ky_Fan |
| Kynea number | B0F6ZX3EWX | object | open | Wikidata Q1122670, OEIS A093069 |
| Kähler differential | 8TW9AAC94D | concept | open | Wikidata Q1609490, nLab Kähler differential |
| Kähler manifold | TEACSRGWJG | concept | open | Wikidata Q1353916, MathWorld KaehlerManifold, nLab Kähler manifold |
| Kähler–Einstein manifold | Y6VY1XQ22M | concept | open | Wikidata Q6453393, EoM Kähler-Einstein_manifold, EoM Kähler-Einstein_metric, nLab Kähler-Einstein manifold |
| König's lemma | SYGY53WANN | statement | open | Wikidata Q1059182, MathWorld KoenigsLemma |
| König's theorem | 8S9MH6EQ85 | statement | open | Wikidata Q897769, MathWorld Koenig-EgevaryTheorem |
| Künneth theorem | 4PJ4SXYAAE | statement | open | Wikidata Q1307676, nLab Künneth theorem |