In the manual, I found the following for the command “norm”:
⋆ norm: norms for real and complex vectors and matrices. Convex. The oneargument
version norm(x) computes the 2-norm for vectors and induced 2-norm
(maximum singular value) for matrices. The two-argument version norm(x,p)
is supported as follows:
– For vectors, all p ≥ 1 are accepted, but see Appendix D.2 for more details
about how cvx handles values other than 1, 2, and Inf.
– For matrices, p must be 1, 2, Inf, or ’Fro’.
So my question is - what does 'Fro" mean?