SemiBase

A certified basis of 23 identities

This list of identities is a basis, proved in Lean, of 2 semigroups of order six, all of which generate the variety V[11165]. Removing the identities that follow from the others leaves 3 identities (Vampire); the variety page shows the shortest known basis.

Identifier sb-94b21cf69109b05a in the data of the bases-min seal.

Certified for

The identities

  1. x² ≈ x⁴
  2. xyx ≈ xyx³
  3. xyx ≈ xy³x
  4. xyx² ≈ xy³
  5. xyxy ≈ xy²x
  6. x³y³ ≈ x²yx
  7. xyxzx ≈ xy²zy
  8. xyxzx ≈ xy²zy
  9. xyxzy ≈ xy²zx
  10. xyxzy ≈ xy²zx
  11. xyzx ≈ xyz³x
  12. xyzx² ≈ xyz³
  13. xyzxy ≈ xyzyx
  14. xyzxz ≈ xyz²x
  15. x³yzy ≈ x²yzxy
  16. x²yxzy ≈ x²y²zx
  17. x²yxzy ≈ x²y²zx
  18. xyxyz² ≈ xyxz²y
  19. xyxz² ≈ xy²z²yx
  20. xyztxz ≈ xyztzx
  21. xyxzt² ≈ xy²zt²yx
  22. xyzxt² ≈ xyz²t²zx
  23. xyzxtu² ≈ xyz²tu²zx