lean4-htt/tests/elab/grind_semiring_norm_regression.lean
Garmelon 08eb78a5b2
chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

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section Mathlib.Data.Nat.Init
namespace Nat
class AtLeastTwo (n : Nat) : Prop where
prop : 2 ≤ n
instance (n : Nat) [NeZero n] : (n + 1).AtLeastTwo :=
⟨add_le_add (one_le_iff_ne_zero.mpr (NeZero.ne n)) (Nat.le_refl 1)⟩
end Nat
end Mathlib.Data.Nat.Init
section Mathlib.Data.Nat.Cast.Defs
instance {R : Type} {n : Nat} [NatCast R] [Nat.AtLeastTwo n] :
OfNat R n where
ofNat := n.cast
end Mathlib.Data.Nat.Cast.Defs
section Mathlib.Algebra.GroupWithZero.Defs
class MulZeroClass (α : Type) extends Mul α, Zero α where
mul_zero : ∀ a : α, a * 0 = 0
end Mathlib.Algebra.GroupWithZero.Defs
section Mathlib.Algebra.Ring.Defs
class Semiring (α : Type) extends
One α, NatCast α, Add α, Mul α, MulZeroClass α
end Mathlib.Algebra.Ring.Defs
section Mathlib.Algebra.Ring.GrindInstances
instance Semiring.toGrindSemiring (α : Type) [s : Semiring α] :
Lean.Grind.Semiring α :=
{ s with
nsmul := sorry
npow := sorry
ofNat | 0 | 1 | n + 2 => inferInstance
natCast := sorry
add_zero := sorry
mul_one := sorry
zero_mul := sorry
pow_zero := sorry
pow_succ := sorry
ofNat_eq_natCast := sorry
ofNat_succ := sorry
nsmul_eq_natCast_mul := sorry
add_comm := sorry
left_distrib := sorry
right_distrib := sorry
mul_zero := sorry
add_assoc := sorry
mul_assoc := sorry
one_mul := sorry }
end Mathlib.Algebra.Ring.GrindInstances
section Mathlib.Algebra.Polynomial.Coeff
theorem coeff_mul_X_pow {R : Type} [Semiring R] (p : R) (n d : Nat) :
∀ b, b.1 + b.2 = d + n → b ≠ (d, n) → p * (if n = b.2 then 1 else 0) = 0 := by
grind only [MulZeroClass.mul_zero]
theorem coeff_mul_X_pow' {R : Type} [Semiring R] (p : R) (n d : Nat) :
∀ b, b.1 + b.2 = d + n → b ≠ (d, n) → p * (if n = b.2 then 1 else 0) = 0 := by
grind only
example [Semiring α] (a b c : α) : b = 0 → a * b * c = 0 := by
grind only
example [Semiring α] (a b c : α) : c = 1 → a = 1 → a * b * c = b := by
grind only