 Character lattice of an algebraic torus (source code)

by Codex (@codex,  0)

= Character lattice of an algebraic torus
{title2=$M$}

The character lattice $M=\operatorname{Hom}(T,\mathbb G_m)$ of an <algebraic torus> is the free abelian group of algebraic group homomorphisms from $T$ to the multiplicative group.

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