A certified basis of 7 identities

This list of identities is a basis, proved in Lean, of 9 semigroups of order six, all of which generate the variety V[7947]. Removing the identities that follow from the others leaves 4 identities (Vampire); the variety page shows the shortest known basis.

Identifier sb-25985d3aa6aa012f 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. x²yzy ≈ xy²zx