# Solving sparse linear system returns a Matrix

**URL:** <https://discourse.julialang.org/t/solving-sparse-linear-system-returns-a-matrix/92451>\
**Category:** Numerics\
**Created:** [January 3, 2023, 10:54am UTC](https://discourse.julialang.org/t/solving-sparse-linear-system-returns-a-matrix/92451 "2023-01-03T10:54:43Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [January 5, 2023, 2:05pm UTC](https://discourse.julialang.org/t/solving-sparse-linear-system-returns-a-matrix/92451/11 "2023-01-05T14:05:59Z")

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> [@A\_C](#):
>
> ```julia
> # Sparse linear solve fails
> @show x = hess_mat \ grad_vec
> 
> ```

See also [Sparse solve with sparse rhs](https://discourse.julialang.org/t/sparse-solve-with-sparse-rhs/81595)

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