Question: which library has parametrization for polynomial system

similar to

http://www.singular.uni-kl.de/Manual/html/sing_951.htm
http://www.singular.uni-kl.de/Manual/html/sing_753.htm


i would like to find all modules in the complex
for example

0 -> A -> B -> C -> 0

would like to find B and C if know A

 

which book describe this algorithm for polynomial system

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