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Bergman's Question 15 on Contracted Semigroup Algebras

Distinct nonzero sixth powers of three semigroup elements do not prevent a nonzero complex vector in their contracted span from having zero sixth power.

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Question 15 has a negative answer

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Bergman's Question 15 on Contracted Semigroup AlgebrasBergman's Question 15 onContracted Semigroup AlgebrasFinite Otto congruence quotients are cancellativeFinite Otto congruencequotients are cancellative
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D5/S0/Certificates/Algebra/BergmanQuestion15Refutation
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D5/S0/Certificates/Algebra/BergmanQuestion15Refutation.lean
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sha256:76a8db6a0f78609b1b9d4a959c8392f2752f2daaddc1930e046e34ce07d0f608
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b52262a023c4db9bb30a128ebfd80ea4ef4c1a53
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37a24ddf3b9983bdabf0acbfd9b32b06c35c28d3

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