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

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  6 Basics

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  6.1 Categories

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  6.1-1 IsStructureObjectOrObjectOrMorphism

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  IsStructureObjectOrObjectOrMorphism( arg )  filter

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  Returns:  true or false

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  This  is  the super super GAP-category which will include the GAP-categories

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  IsStructureObjectOrObject and IsHomalgObjectOrMorphism

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  6.1-2 IsStructureObjectOrObject

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  IsStructureObjectOrObject( arg )  filter

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  Returns:  true or false

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  This  is  the  super  GAP-category  which  will  include  the GAP-categories

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  IsHomalgRing, IsHomalgModule, IsHomalgRingOrModule and IsHomalgComplex

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  6.1-3 IsStructureObject

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  IsStructureObject( arg )  filter

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  Returns:  true or false

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  This  is  the  super  GAP-category  which  will  include  the GAP-categories

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  IsHomalgRing  we  need  this  GAP-category to define things like Hom(M,R) as

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  easy  as  Hom(M,N)  without  distinguishing  between structure objects (e.g.

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  rings) and objects (e.g. modules)

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  6.1-4 IsStructureObjectMorphism

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  IsStructureObjectMorphism( arg )  filter

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  Returns:  true or false

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  This  is  the  super  GAP-category  which  will  include  the GAP-categories

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  IsHomalgRingMap, etc.

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  6.1-5 IsHomalgRingOrModule

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  IsHomalgRingOrModule( arg )  filter

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  Returns:  true or false

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  this  is  the  super  GAP-category  which  will  include  the GAP-categories

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  IsHomalgRing, IsHomalgModule:

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