This is about improvements in already implemented "Matrix Math" node. This node takes one or two (or more?) matrices and produces one by composing them.
Multiply
Addition (?)
Matrix Decompose node
This node takes one matrix and produces several matrices.
QR decomposition
SVD decomposition (?)
Eigenedecomposition (?)
Special Matrix node
This node takes some vectors and parameters and produces one matrix of special kind.
Householder matrix
Autorotate using Householder
Autorotate using Vector.rotation_difference()
Autorotate using Vector.to_track() // This one is implemented in "matrix track" node, merge?
Matrix Math Node
This is about improvements in already implemented "Matrix Math" node. This node takes one or two (or more?) matrices and produces one by composing them.
Matrix Decompose node
This node takes one matrix and produces several matrices.
Special Matrix node
This node takes some vectors and parameters and produces one matrix of special kind.