SemiBase

A certified basis of 10 identities

This list of identities is a basis, proved in Lean, of 10 semigroups of order six, all of which generate the variety V[2847]. Removing the identities that follow from the others leaves 3 identities (Vampire); the variety page shows the shortest known basis.

Identifier sb-1050c166a6a479b9 in the data of the bases-min seal.

Certified for

The identities

  1. x³ ≈ x⁵
  2. xyx ≈ yx²
  3. x⁴y ≈ x²y
  4. x³yx ≈ xyx
  5. x²yx ≈ xy³
  6. x²y² ≈ xy²x
  7. x²y³ ≈ xyx
  8. xyx ≈ xy³x
  9. xyz ≈ yxz
  10. x³yz ≈ xyz