# Get an eigvec by eigval, using eigvecs, only allow SymTridiagonal?

**URL:** <https://discourse.julialang.org/t/get-an-eigvec-by-eigval-using-eigvecs-only-allow-symtridiagonal/127408>\
**Category:** New to Julia\
**Tags:** question, linearalgebra\
**Created:** [March 27, 2025, 11:14am UTC](https://discourse.julialang.org/t/get-an-eigvec-by-eigval-using-eigvecs-only-allow-symtridiagonal/127408 "2025-03-27T11:14:15Z")\
**Posts on this page:** 1\
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**Author:** ![WalterMadelim](https://avatars.discourse-cdn.com/v4/letter/w/3e96dc/32.png) [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Post date:** [March 28, 2025, 4:06am UTC](https://discourse.julialang.org/t/get-an-eigvec-by-eigval-using-eigvecs-only-allow-symtridiagonal/127408/7 "2025-03-28T04:06:58Z")

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Ah, yes. But is it efficient? x-ref [this](https://github.com/JuliaLang/LinearAlgebra.jl/issues/1248#issuecomment-2760008073).

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