CoeffOfTerm(T:POLY,F:POLY):C
CoeffOfTerm(T:VECTOR,F:VECTOR):C

where T is a term (no coefficient) and C is one of INT, RAT, or
ZMOD. 

coefficient of a term of a polynomial or vector

This function returns the coefficient of the term T occurring in F. 

Use R ::= Q[x,y,z];
F := 5xy^2-3z^3;
CoeffOfTerm(xy^2,F);
5
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CoeffOfTerm(x^3,F);
0
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CoeffOfTerm(z^3,F);
-3
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CoeffOfTerm(Vector(0,x^3,0),Vector(x+3,6xy-5x^3,x-z^2));
-5
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