ModularGroup.lcRow0

(Fin 2 → ℤ) → Matrix (Fin 2) (Fin 2) ℝ →ₗ[ℝ] ℝ

Given coprime_pair p=(c,d), the matrix [[a,b],[*,*]] is sent to a*c+b*d. This is the linear map version of this operation.

Defined in: Mathlib.NumberTheory.Modular
Cited by: 4 results in Mathlib
Foundations: Depth 96 from the axioms · uses propext, Classical.choice, Quot.sound

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