TMatrixUtils gone in v4

I’m using a large package which uses TMatrixUtils.h, apparently now gone in version 4.
Does this mean that one should not expect backwards compatibility, and that attempting
to use the new root version necessarily implies going through (partly) unknown code to
make it compatible to a new header structure?

Hi,

In root version 4 (see release notes) we renamed TMatrix to TMatrixF
in order to be more consistent with the used nomenclature .
To ease a bit the “pain” we did keep a TMatrix :

class TMatrix : public TMatrixF

Best is to replace all your TMatrix by TMatrixF so
TMatrixUtils.h by TMatrixFUtils.h .

Eddy