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  "body": "\n## Summary\n\nIn mathematics, **monus** is an operator on certain [[commutative|099E72KTF8]] [[monoids|0N6R902FG1]] that are not groups. A commutative monoid on which a monus operator is defined is called a **commutative monoid with monus**, or **CMM**. The monus operator may be denoted with the minus sign, \"$-$\", because the [[natural numbers|0MWKJ44V5A]] are a CMM under subtraction. It is also denoted with a dotted minus sign, \"$\\mathbin{\\dot{-}}$\", to distinguish it from the standard subtraction operator.\n",
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