| ‣ KernelSubobject( phi ) | ( attribute ) | 
Returns: a homalg submodule
The kernel ideal of the ring map phi.
| ‣ 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)).
| ‣ Kernel( phi ) | ( method ) | 
Returns: a homalg module
The kernel ideal of the ring map phi as an abstract module.
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