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BigFloat support for TwoPointBVProblem using MIRK4 #43

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seadra opened this issue May 11, 2019 · 6 comments · Fixed by #202
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BigFloat support for TwoPointBVProblem using MIRK4 #43

seadra opened this issue May 11, 2019 · 6 comments · Fixed by #202

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@seadra
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seadra commented May 11, 2019

Using BigFloat with a TwoPointBVProblem and MIRK4 solver currently fails with the following error:

ArgumentError: matrix type SparseArrays.SparseMatrixCSC{BigFloat,Int64}not supported. Try lu(convert(SparseMatrixCSC{Float64/ComplexF64,Int}, A)) for sparse floating point LU using UMFPACK or lu(Array(A)) for generic dense LU.
@ChrisRackauckas
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We probably just need to add a dependency on GenericSVD.jl

@seadra
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seadra commented May 16, 2019

I naively tried using GenericSVD in my code but it didn't work, so I'm guessing that means something else :)

@avik-pal
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I thought BigFloat would just work, but seems like the problem is more fundamental

julia> similar(rand(BigFloat, 2, 3))
2×3 Matrix{BigFloat}:
 #undef  #undef  #undef
 #undef  #undef  #undef

This makes all of the internal NonlinearSolve machinery fail because it often performs concatenation and such on a similared array before assigning values to it.

@avik-pal avik-pal mentioned this issue Apr 25, 2024
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@ChrisRackauckas
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For safety, just zero?

@avik-pal
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yes probably that's the way to go, it just needs to be added at quite a few places in NonlinearSolve

@avik-pal avik-pal mentioned this issue May 25, 2024
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@avik-pal
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NonlinearSolve now supports bigfloats natively. Need to add a test for this here.

@ErikQQY ErikQQY mentioned this issue Jul 27, 2024
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Fix support for BigFloat u0 ErikQQY/BoundaryValueDiffEq.jl
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@ChrisRackauckas @seadra @avik-pal