Bug SS-209
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Nonlinear Solvers: FindRoot() problem
Created by Martin Kraska on 8/30/2014 1:29 PM Last Updated by martinka on 10/3/2025 8:24 PM
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 Description

FindRoots seems to be a bit affected by changes in SMath. The attached example works fine in 0.97.5154 but shows problems in 0.97.5346

0.97.5154

0.97.5346
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    martinka (Friday, October 3, 2025 8:23 PM) #

It looks like the problem comes from the way variable A is being cleared. The solver treats only d as reset, and the same behavior shows up with FindRoot. In SMath version 0.97.5346, if I turn off the assignment for A, the calculation works as expected. I’ll dig deeper into if he's playing you, to see what’s really going on.

    Davide (Saturday, August 30, 2014 3:38 PM) #

The issue seems it is in how A is cleared... Unknowns recognize just d as cleared, the same for FindRoot... In SMath 0.97.5346 if I disable the assignment of A, I get the result. I'll investigate...