PowerSeries.coeff_order

∀ {R : Type u_1} [inst : Semiring R] {φ : PowerSeries R}, φ ≠ 0 → (PowerSeries.coeff φ.order.toNat) φ ≠ 0

If the order of a formal power series is finite, then the coefficient indexed by the order is nonzero.

Defined in: Mathlib.RingTheory.PowerSeries.Order
Cited by: 4 results in Mathlib
Foundations: Depth 69 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: Semiring

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