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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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  4 External Rings

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  4.1 External Rings: Representation

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  4.1-1 IsHomalgExternalRingRep

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  IsHomalgExternalRingRep( R )  Representation

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  Returns:  true or false

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  The internal representation of homalg rings.

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  (It is a representation of the GAP category IsHomalgRing.)

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  4.2 Rings: Constructors

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  4.3 External Rings: Operations and Functions

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