Andreas Varga

I think this issue can be closed. However, I wonder if the following is in the current version correct: ``` a=Polynomial.(rand(0,0)) 0×0 Matrix{Any} ``` In an earlier version (see my...

Interesting. Thus, this is an error in LinearAlgebra. Should I make an issue for this? Recently I fighted with type piracy in DescriptorSystems. I was not able to get rid...

Only the square case is implemented in `LinearAlgebra.UniformScaling` at line #394: `promote_to_arrays_(n::Int, ::Type{Matrix}, J::UniformScaling{T}) where {T} = copyto!(Matrix{T}(undef, n,n), J)` With my handling of type piracy I get: ``` julia>...

Apparently we have to wait for Julia 1.8 to be fixed in LinearAlgebra. Should we close this issue?

I have a mean to obtain this ``` rtf.([s;0]) 2-element Array{RationalTransferFunction{Int64},1}: RationalTransferFunction{Int64}(Polynomial(s), Polynomial(1), 0.0) RationalTransferFunction{Int64}(Polynomial(0), Polynomial(1), 0.0) ``` but I would prefer the elegant way you chose.

The `RationalTransferFunction` will be a new object in the next release of the [DescriptorSystems.jl](https://github.com/andreasvarga/DescriptorSystems.jl). My hope was that somebody will implement a rational function package, which I can use as...

Thanks for the hint. I implemented the promotion rule, but it still remain two issues. The first one concerns the possibility of different variables (this is an issue for `Polynomials`...

I implemented a set of concatenation functions for polynomial matrices. It is now possible to generate polynomial matrices with correctly set variable names. For example, the following examples combines scalars,...

I hope it works. john verzani schrieb am Mo., 8. Feb. 2021, 22:31: > Neat. I'm hoping to make this easier for you. I'm almost done with a PR >...

Another try. [polynomial_concatenations.zip](https://github.com/JuliaMath/Polynomials.jl/files/5950212/polynomial_concatenations.zip)