Concatenating KroneckerProduckLinearOperator objects

[AndreaBraschi]

Hi all,

I am trying to concatenate 2 KroneckerProductLinearOperator objects of shapes (100, 100) and (50, 50) in a way that the resulting LinearOperator is shape(150, 150). i was wondering if there is a way of doing it without having to evaluate the LinearOperator objects?

Many thanks in advance.

Andrea

[Balandat]

What do you mean by concatenating? In the standard meaning of concatenation these the two have to share at least one dimension, which isn't the case here. Do you maybe mean that you want to build a block diagonal operator out of these? BlockDiagLinearOperator can help with that.

[AndreaBraschi]

Hi @Balandat,

many thanks for getting back to me.

Yes, my idea was to create a block-diagonal structure with square matrices with different size.
I thought the BlockDiagonalLinearOperator only worked with square matrices with homogenous size. I'll have a go trying that class.

Andrea

[Balandat]

Ah yeah I guess you're right that's not supported at this point. See related discussion here: #73