# \#history

**URL:** https://discourse.julialang.org/tag/history/57.md

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

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## [Getting duals for nonlinear programming problem](https://discourse.julialang.org/t/getting-duals-for-nonlinear-programming-problem/11357)

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**Author:** [@pedroborgesmelo](https://discourse.julialang.org/u/pedroborgesmelo)\
**Replies:** 7\
**Last updated:** [April 24, 2025, 3:55pm UTC](https://discourse.julialang.org/t/getting-duals-for-nonlinear-programming-problem/11357 "2025-04-24T15:55:42Z")

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Hi Guys! I’m having problems getting the dual variables for a nonlinear problem, with Ipopt as the solver… I just found this post here of 2015, but not working here and a bit old: https://github.com/JuliaOpt/JuMP.jl/i…

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## [Run the half-life of code analysis on Julia?](https://discourse.julialang.org/t/run-the-half-life-of-code-analysis-on-julia/763)

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**Author:** [@StefanKarpinski](https://discourse.julialang.org/u/StefanKarpinski)\
**Replies:** 11\
**Last updated:** [July 25, 2022, 7:22pm UTC](https://discourse.julialang.org/t/run-the-half-life-of-code-analysis-on-julia/763 "2022-07-25T19:22:28Z")

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Not quite a language development post (so maybe it will get recategorized), but it would be interesting to see the results of this “half-life of code” analysis on Julia’s git repo: I thought the results would be inter…

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## [The role of femtolisp in Julia?](https://discourse.julialang.org/t/the-role-of-femtolisp-in-julia/1902)

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**Author:** [@abhi18av](https://discourse.julialang.org/u/abhi18av)\
**Replies:** 40\
**Last updated:** [July 11, 2022, 8:25pm UTC](https://discourse.julialang.org/t/the-role-of-femtolisp-in-julia/1902 "2022-07-11T20:25:44Z")

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Hii Julians, I was wondering about the exact usage of femtolisp in julia. I’ve Googled around but the nothing exact came up, though there were some references in the old archives. I know that the julia-parser has a nat…

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## [SciML, early works and precursors](https://discourse.julialang.org/t/sciml-early-works-and-precursors/54374)

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**Author:** [@Axlrsn](https://discourse.julialang.org/u/Axlrsn)\
**Replies:** 2\
**Last updated:** [February 2, 2021, 11:08am UTC](https://discourse.julialang.org/t/sciml-early-works-and-precursors/54374 "2021-02-02T11:08:14Z")

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Hi everyone! As a part of my master thesis, I’m making a literature overview of SciML and particularly tracing the origins of the approach. I appreciate any suggestions on early papers or other sources on research that…

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## [Julia motivation: why weren't Numpy, Scipy, Numba, good enough?](https://discourse.julialang.org/t/julia-motivation-why-werent-numpy-scipy-numba-good-enough/2236)

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**Author:** [@John\_Gibson](https://discourse.julialang.org/u/John_Gibson)\
**Replies:** 120\
**Last updated:** [September 21, 2018, 1:33pm UTC](https://discourse.julialang.org/t/julia-motivation-why-werent-numpy-scipy-numba-good-enough/2236 "2018-09-21T13:33:41Z")

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I recently gave a Why Julia? talk to a roomful of computational fluid dynamicists and astrophysicists. (John Gibson, UNH & KITP, Julia - a high-performance dynamic programming language for technical computing, Kavli Inst…

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## [Understanding changes from Case Study: Rational Conversions](https://discourse.julialang.org/t/understanding-changes-from-case-study-rational-conversions/4722)

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**Author:** [@hpoit](https://discourse.julialang.org/u/hpoit)\
**Replies:** 1\
**Last updated:** [July 7, 2017, 6:42pm UTC](https://discourse.julialang.org/t/understanding-changes-from-case-study-rational-conversions/4722 "2017-07-07T18:42:28Z")

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Hello! How do I find the issue commenting on the changes made from https://docs.julialang.org/en/stable/manual/conversion-and-promotion/#man-rational-conversion-1 to https://github.com/JuliaLang/julia/blob/master/base/…

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## [Examining an older and simpler version of Julia](https://discourse.julialang.org/t/examining-an-older-and-simpler-version-of-julia/1142)

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**Author:** [@pitao](https://discourse.julialang.org/u/pitao)\
**Replies:** 7\
**Last updated:** [February 6, 2017, 9:50pm UTC](https://discourse.julialang.org/t/examining-an-older-and-simpler-version-of-julia/1142 "2017-02-06T21:50:28Z")

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I would like to gain a source-code level understanding of how Julia works. (I understand it’s going to be a lot of work!) With Github one can examine each moment of Julia’s history. There must be points at which the so…