PowerSeries.order_mul

∀ {R : Type u_1} [inst : Semiring R] [NoZeroDivisors R] (φ ψ : PowerSeries R), (φ * ψ).order = φ.order + ψ.order

The order of the product of two formal power series over an integral domain is the sum of their orders.

Defined in: Mathlib.RingTheory.PowerSeries.Order
Cited by: 2 results in Mathlib
Foundations: Depth 92 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: Semiring NoZeroDivisors

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