sig
type 'mat unop =
?m:int ->
?n:int ->
?br:int -> ?bc:int -> ?b:'mat -> ?ar:int -> ?ac:int -> 'mat -> 'mat
type 'mat binop =
?m:int ->
?n:int ->
?cr:int ->
?cc:int ->
?c:'mat ->
?ar:int -> ?ac:int -> 'mat -> ?br:int -> ?bc:int -> 'mat -> 'mat
end