Hello all, I have a set of differential equations I’m trying to solve. One of them includes a max() function. I am wondering if that is the reason why I am sometimes unable to solve this equation. Can the solver “integrate” max()? Do I need to specifically handle that discontinuity somehow? Here i…

[image] Handling Instability When Solving ODE Problems Modelling & Simulations Thanks for the example. I will share as little as possible but just a snippet in order to explain what’s going on to others. This is a good teaching opportunity. I was able to find out that the…

the discontinuity is a problem. check out the documentation for callbacks.

Thanks for that. I started by trying a soft max approach as follows. # Define a soft max() function. function softmax(x, y, k) return log(exp(k*x) + exp(k*y))/k end dOC_missing = softmax(required_dOC - dOC_content, 0, 10) # max(required_dOC - dOC_content, 0) However the yie…

Max function in differential equation

General Usage

ChrisRackauckas October 24, 2022, 12:42pm 3

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Max function in differential equation

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