Am 01.12.22 um 17:06 schrieb Sven Schreiber:

if I create a new matrix without assignment (matrix m), I get a 0x0 empty matrix. Can I rely on this behavior or is it in principle undefined and could change in the future?

I would recommend to follow one basic programming principle: explicit is better than implicit, meaning being concrete and specific instead of abstract and general ;-)

I think this is more explicit and _not_ expected to change:

<hansl>
  matrix m = {}
</hansl>

Yes, in principle I agree. However, you can do "matrix m n o" on one line to create several objects, and you would need three separate lines being explicit. And I really like having less code lines, that's also what attracted me to Python in the past.

thanks

sven