Additional quotient theory with user provided canon map#1058
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While looking for theories to migrate to quotients now that #1006 is fixed I found that
Matrix.ecaandDynMatrix.ecawere explicitly choosing the representatives for the quotient, but thatQuotient.ecdid not facilitate this.Matrix.ecaused an axiomatized definition andDynMatrix.ecaadded some glue on top of the cloned quotient.I add a new theory,
CanonQuotient, toQuotient.ecto facilitate this use case, requiring an idempotentcanonmap sending every element in each equivalence class to its representative. This simplifies the construction of matrices and vectors inDynMatrix.ecaand deaxiomatizesMatrix.eca.Rather than defining
CanonQuotientas an extension toEquivQuotientI do it the other way around becauseEquivQuotientwas already constructed by building an idempotentcanonmap.