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Question: How to use a NULL result from fsolve as a condition to break a loop?

Question:How to use a NULL result from fsolve as a condition to break a loop?

sepbergliaffa 20 Maple 18
March 02 2018
2

 

Hi, I am using fsolve to find the roots x of a nonpolynomial expression f(x,a) = 0, using a loop for do to vary the values of the parameter a in small identical steps. At some stage, fsolve cannot find a solution. According to the Maple help, in this case fsolve returns a NULL sequence. I would like to know how to use the fact that fsolve cannot find a solution to break the loop with an if-then statement. 
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