Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
d64ae32965
This PR implements the generation of compact proof terms for Nullstellensatz certificates in the new commutative ring procedure in `grind`. Some examples: ```lean example [CommRing α] (x y : α) : x = 1 → y = 2 → 2*x + y = 4 := by grind +ring example [CommRing α] [IsCharP α 7] (x y : α) : 3*x = 1 → 3*y = 2 → x + y = 1 := by grind +ring example [CommRing α] [NoZeroNatDivisors α] (x y : α) : 3*x = 1 → 3*y = 2 → x + y = 1 := by grind +ring example (x y z : BitVec 8) : z = y → (x + 1)*(x - 1)*y + y = z*x^2 + 1 → False := by grind +ring ``` |
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