10
Permute (continued)
•1-to-1 applications of # (permutations) can be programmed using either gather or scatter
•When the indices are not all different, the behavior differs
–[1..n] V := V#[n];  -- assign every element V[n]
–[1..n] V#[n] := V;  -- unpredictable
• In recent months permute has been upgraded
•Syntax
•Combining
•Rank change
•Serious Optimizations