Can anyone please help me understand u. v on monad case?
For instance, -/ . * i.3, how's it get reduced step by step on the definition 
below?
 
DET=: 2 : 'v/@,`({."1 u . v $:@minors)@.(0<{:@$) @ ,. "2' minors=: }."1 @ 
(1&([\.)) 

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