# \#polynomial

**URL:** https://discourse.julialang.org/tag/polynomial/635.md

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## [Polyfit (in Polynomials.jl ?) not working in new Julia version?](https://discourse.julialang.org/t/polyfit-in-polynomials-jl-not-working-in-new-julia-version/108815)

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**Author:** [@CosmoProf](https://discourse.julialang.org/u/CosmoProf)\
**Replies:** 17\
**Last updated:** [January 26, 2024, 7:00am UTC](https://discourse.julialang.org/t/polyfit-in-polynomials-jl-not-working-in-new-julia-version/108815 "2024-01-26T07:00:38Z")

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Hi, has the Polynomials.polyfit command been discontinued or changed? I recently updated from Julia (JuliaPro) 1.4.2-1 to Julia 1.10.0, and ran a large simulation program in the new version, which crashed with an error …

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## [Why does Zygote Gradient not work on Polynomials.jl?](https://discourse.julialang.org/t/why-does-zygote-gradient-not-work-on-polynomials-jl/57031)

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**Author:** [@Allan\_Baker](https://discourse.julialang.org/u/Allan_Baker)\
**Replies:** 2\
**Last updated:** [May 19, 2021, 12:10pm UTC](https://discourse.julialang.org/t/why-does-zygote-gradient-not-work-on-polynomials-jl/57031 "2021-05-19T12:10:55Z")

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What am I missing. Why does Zygote’s gradient not work on Polynomials.jl polynomial. That module even has a derivative function. New to this Zygote stuff. module testZygote using Zygote using Polynomials p=Polynomi…