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 [x] u@v y Atop Conjunction
 [x] u@v y Atop Conjunction

Rank -- depends on the rank of v -- WHY IS THIS IMPORTANT?

Forms the composition (u@v) of verbs u and v .

The resulting verb is applied independently to each cell of the argument(s).

• Operand u is always executed monadically on the result of each application of v
${\displaystyle {\pi ^{2} \over 6}=\sum _{i=1}^{\infty }{1 \over i^{2}}}$