Theorem PowerSeries.coeff_subst_sum_C_substInvFun_mul_X_pow_sub_X

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) …
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