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Question: A threadsafe procedure to count the number of solutions from PolynomialSystem

Question:A threadsafe procedure to count the number of solutions from PolynomialSystem

emendes 445 Maple 2020
polynomial parallelization threadsafe
July 25 2020
0

Hello

I need to check if the solution (sols) of a (nonlinear) polynomial system of equations (the coefficients are not numeric) has only one solution for, let's say, y and z (one solution for y and one solution for z).  I cannot use allvalues (not threadsafe according to CodeTools:-ThreadSafetyCheck) and then count the number of solutions. 

I have removed all solutions that fit the command 

ormap(x->x=true,map(has,rhs~(op~(sols)),_Z))

(RootOf works too).  (Please tell me if I am using ormap correctly).  

Even using the above command and then checking if nops(sols)=1, not all one solutions are caught.  

Many thanks

Ed

 

 

 

 
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