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image -- image of a map

Description

image h -- yields the image of the homomorphism h.

The result will be a submodule of the target of h

If h is a ring element, it is interpreted as a one by one matrix.

Ways to use image :

"image(ChainComplexMap)"
"image(GradedModuleMap)"
"image(Matrix)"
"image(RingElement)"

For the programmer

The object image is a method function.