Math 2.0

concept

Presentation of a group

Summary

A presentation ⟨S∣R⟩\langle S \mid R \rangle describes a group by a set SS of generators and a set RR of relations. The group is the quotient of the free group on SS by the normal subgroup generated by RR.

What this node needs for W2
  • edge instance_of in: at least two examples (0 of 2)
  • edge not_instance_of in: at least one non-example (0 of 1)
  • edge specializes both: the more general notions and the special cases (0 of 1)

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Sources

  1. Web https://en.wikipedia.org/wiki/Presentation_of_a_group, lead section

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