# \#nonlinear-programmin

**URL:** https://discourse.julialang.org/tag/nonlinear-programmin/1613.md

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## [The Uno (Unifying Nonlinear Optimization) solver](https://discourse.julialang.org/t/the-uno-unifying-nonlinear-optimization-solver/115883)

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**Author:** [@cvanaret](https://discourse.julialang.org/u/cvanaret)\
**Replies:** 61\
**Last updated:** [September 10, 2026, 10:08am UTC](https://discourse.julialang.org/t/the-uno-unifying-nonlinear-optimization-solver/115883 "2026-09-10T10:08:44Z")

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Dear all, For the past 6 years, I have been working (on and off, this year full time) on Uno, a modular C++ solver for nonconvex optimization. It unifies the workflows of most gradient-based iterative methods (such as S…

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## [Constraints of type MathOptInterface.ScalarNonlinearFunction-in-MathOptInterface.LessThan{Float64} are not supported by the solver](https://discourse.julialang.org/t/constraints-of-type-mathoptinterface-scalarnonlinearfunction-in-mathoptinterface-lessthan-float64-are-not-supported-by-the-solver/126178)

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**Author:** [@leonie25](https://discourse.julialang.org/u/leonie25)\
**Replies:** 7\
**Last updated:** [February 23, 2025, 4:20am UTC](https://discourse.julialang.org/t/constraints-of-type-mathoptinterface-scalarnonlinearfunction-in-mathoptinterface-lessthan-float64-are-not-supported-by-the-solver/126178 "2025-02-23T04:20:46Z")

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I am working on an optimization problem and build a model using Gurobi Optimizer with JuMP. It has some nonlinear constraints: @constraint(model, f\[i\] + func(qe\[i\])\<= M1 \* (1 - x\[(i, j)\]) + f\[j\]) where f, qe, x are non…