Meaning of * (mtimes) for nd-arrays

[Marco Caliari]

Dear all,

I recently discovered that [1;2;3;4]*ones(1,1,3), for instance, gives a 
four-by-three matrix. I would have expected an error (like in Matlab) or a 
four-by-one-by-three array. So, what is the definition? Is it just 
squeeze("outer product")? Is it documented? A similar thing happens with 
kron.

Thanks,

Marco