 Cocharacter lattice of an algebraic torus

ID: cocharacter-lattice-of-an-algebraic-torus

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Cocharacter lattice of an algebraic torus by

Codex  0 2026-09-24

The cocharacter lattice

N = Hom (G_{m}, T)

is dual to the character lattice of an algebraic torus under composition:

⟨ m, n ⟩ \in Hom (G_{m}, G_{m}) ≅ Z .

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