Theorems · Definition · commutative algebra

Function.Surjective.nonUnitalSemiring

{R : Type u_1} →
  {S : Type u_2} →
    (f : R → S) →
      Function.Surjective f →
        [inst : Add S] →
          [inst_1 : Mul S] →
            [inst_2 : Zero S] →
              [inst_3 : SMul ℕ S] →
                [inst_4 : NonUnitalSemiring R] →
                  f 0 = 0 →
                    (∀ (x y : R), f (x + y) = f x + f y) →
                      (∀ (x y : R), f (x * y) = f x * f y) →
                        (∀ (n : ℕ) (x : R), f (n • x) = n • f x) → NonUnitalSemiring S

Pushforward a NonUnitalSemiring instance along a surjective function.

Defined in

Mathlib.Algebra.Ring.InjSurj

Cited by

0 results in Mathlib

Foundations

Depth 15 from the axioms · uses propext

Assumes

AddMulZeroSMulNonUnitalSemiring