SemiBase

A certified basis of 11 identities

This list of identities is a basis, proved in Lean, of 6 semigroups of order six, all of which generate the variety V[8206]. Removing the identities that follow from the others leaves 7 identities (Vampire); the variety page shows the shortest known basis.

Identifier sb-7f4c1e22f202de90 in the data of the bases-min seal.

Certified for

The identities

  1. x² ≈ x³
  2. x²yx ≈ xyx
  3. xyx ≈ xyx²
  4. x²y² ≈ xyxy
  5. x²y² ≈ xy²x
  6. xyxzx ≈ xyzx
  7. xy²z² ≈ xzy²z
  8. xyzxy ≈ xyzyx
  9. xyxztz ≈ xyzxtz
  10. xyxztz ≈ xyzxtz
  11. xyztyz ≈ xzytyz