# \#experience

**URL:** https://discourse.julialang.org/tag/experience/1763.md

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## [Gurobi's tolerance on convexity in QCP is about \`1e-13\`](https://discourse.julialang.org/t/gurobis-tolerance-on-convexity-in-qcp-is-about-1e-13/127297)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 10\
**Last updated:** [April 15, 2025, 6:18am UTC](https://discourse.julialang.org/t/gurobis-tolerance-on-convexity-in-qcp-is-about-1e-13/127297 "2025-04-15T06:18:40Z")

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Following this topic I do the following test to verify the title using JuMP, Gurobi function test\_convexity(d) # if it ain't Error, the model is deemed convex (by Gurobi) model = Model(Gurobi.Optimizer) @vari…

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## [I added 1 Million constraints to an LP unwittingly](https://discourse.julialang.org/t/i-added-1-million-constraints-to-an-lp-unwittingly/127668)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 36\
**Last updated:** [April 13, 2025, 8:59pm UTC](https://discourse.julialang.org/t/i-added-1-million-constraints-to-an-lp-unwittingly/127668 "2025-04-13T20:59:22Z")

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This topic is sharing an experience, probably a noob has not seen before (me included). Put it simply, I’m solving a disjointed bilinear programming using RLT, and wasn’t realizing that the number of constraints will be…