BlockBandedMatrices.jl

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Performances of mul!(x, transpose(B), y)

2

Thanks for the great package! I am trying to use BandedBlockBandedMatrix as a Jacobian in NLsolve (following https://github.com/JuliaDiffEq/DifferentialEquations.jl/issues/483). However the performances get worse than for a sparse matrix. I think...

matthieugomez

Array(::BlockSkylineMatrix) returns nothing

1

```julia julia> BlockBandedMatrix{Float64}(undef, (1:3,1:3),(1,1)) |> Array ``` Cf. https://github.com/JuliaLang/julia/issues/32213#issuecomment-499095683

dlfivefifty

New type of BlockTridiagonalKron (or something)

6

Combination code and basic linear algebra question for @dlfivefifty and any other experts: We have a very particular structure for some of my sparse matrices, which is common enough in...

jlperla

No method for multiplying compatible BlockSkyLineMatrix and BandedMatrix

2

Matrix multiplication is apparently not currently defined for BlockSkyLineMatrix and BandedMatrix even when dimensions should be compatible (i.e m x n array times n x k array). Not entirely sure...

TSGut

Fast qr for `BlockSkylineMatrix` and Cholesky for `Symmetric{<:Any,<:BlockSkylineMatrix}`

6

@jagot I'm going to tackle this soon which should speed up \ a lot. Essentially its not too hard to do this in-place, calling LAPACK to do the heavy work.

dlfivefifty

Allow general backends in `BlockSkylineMatrix`

1

I have a need for non-Vector (in fact, infinite) backends in `BlockSkylineMatrix` so am planning to template out the storage, just as `BandedBlockBandedMatrix` and `BlockArray` allow general backends. While I'm...

dlfivefifty

dlfivefifty

Add BlockSkylineLayout

1

dlfivefifty

Move BandedMatrices+BlockArrays to BlockArray extension

1

dlfivefifty

Some of this package is just type piracy of BlockArrays.jl + BandedMatrices.jl so could be an extension.

dlfivefifty