User talk:2600:1:9B9A:243B:BAB9:9407:D91:3692

I am surprised to see that the section on matrix-by-matrix derivative has been replaced by a blank message.

The layout makes sense for the "First identification theorem for matrix functions". What is the rational behind this removal?

Theflofly (talk) 13:39, 26 April 2019 (UTC)