{⊢⍵} {,⍵} {⊂⍵} {+/,⍵} {∧/,⍵} {∨/,⍵} {=/,⍵} {≠/,⍵} { +/,A×⍵} { +/⍪A×⍤2⊢⍵} {C<+/,A×⍵} {C<+/⍪A×⍤2⊢⍵}
C: a single number or a variable whose value is a single number A: a variable whose value is a rank-2 or -3 array The comparison can be < ≤ ≥ > = ≠ odd window size; movement 1; matrix argument