Theorem PowerSeries.subst_substInv_left

Modification history

2026-04-08 19:05
Mathlib/RingTheory/PowerSeries/Substitution.lean
feat(RingTheory/PowerSeries): Construction of `Q` such that `P(Q(X)) = X` (#26645) …
Added PowerSeries.subst_substInv_leftView on Github →