Contents

Contents

Idea

For $A$ an abelian group there is a group automorphism

$- \;\colon \; A \stackrel{\simeq}{\longrightarrow} A$

given by sending any element $a$ to its inverse $-a$.

This is an involution.

References

Last revised on June 4, 2020 at 09:53:25. See the history of this page for a list of all contributions to it.