numbas/Numbas — comment on commit ec8f638425770c6c05d33437ea6e9440c8fa6fe1
File:  line 0
By BillFoster:

See http://mathworld.wolfram.com/MatrixNorm.html for a list of possible norms! I have a strong affection for the spectral norm, but that comes from the Perron-Frobenius theorem of which I am fond as it is used somewhat spuriously but elegantly by Saaty in decision making using pairwise comparisons.