| At | u@:v _ _ _ |
|
@: is equivalent to @ except that ranks are infinite.
|
x=: 1 2 3 4
y=: 7 5 3 2
x */ @: + y Applies product over sums to the entire lists
2016
x */ @ + y Applies product over sums to each item of the list
8 7 6 6
+ b. 0
0 0 0
*/ @: + b. 0
_ _ _
*/ @ + b. 0
0 0 0