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4 Ring Maps
 4.1 Ring Maps: Attributes
 4.2 Ring Maps: Operations and Functions

4 Ring Maps

4.1 Ring Maps: Attributes

4.1-1 KernelSubobject
‣ KernelSubobject( phi )( attribute )

Returns: a homalg submodule

The kernel ideal of the ring map phi.

4.1-2 KernelEmb
‣ KernelEmb( phi )( attribute )

Returns: a homalg map

The embedding of the kernel ideal Kernel(phi) into the Source(phi), both viewed as modules over the ring R :=Source(phi) (cf. Kernel (4.2-1)).

4.2 Ring Maps: Operations and Functions

4.2-1 Kernel
‣ Kernel( phi )( method )

Returns: a homalg module

The kernel ideal of the ring map phi as an abstract module.

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