I was wondering if someone could explain the differences between fixing and constraining a variable in a little more detail than the JuMP documentation does. If you use fix(...; force=true); my understanding is that this will clamp down the variable to your given value and remove any way for it to …

Fixing vs Constraining a variable in JuMP

ccoffrin August 16, 2019, 4:43pm 6

BTW Ipopt has special treatment of variables with the same upper and lower bounds. This option may be of interest, https://www.coin-or.org/Ipopt/documentation/node44.html#opt:fixed_variable_treatment

Searching for a simple polynomial curve fitting example

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