SemiBase

A certified basis of 8 identities

This list of identities is a basis, proved in Lean, of 2 semigroups of order six, all of which generate the variety V[7659]. Removing the identities that follow from the others leaves 4 identities (Vampire); the variety page shows the shortest known basis.

Identifier sb-562f22d2e0d59fe6 in the data of the bases-min seal.

Certified for

The identities

  1. x² ≈ x³
  2. x²yx ≈ xyx
  3. xyx ≈ xyx²
  4. xyx ≈ xy²x
  5. x²y² ≈ xyxy
  6. xyx ≈ xyxyx
  7. xy²z ≈ xyz
  8. x²yz ≈ xyxz