














n 
Predefined
Reductions – A number of reductions are


predefined,
including ones that




– 
Sum
values or arrays




– 
Calculate
the product of values or arrays




– 
Calculate
the maximum contributed value




– 
Calculate
the minimum contributed value




– 
Calculate
the logical and of integer values




– 
Calculate
the logical or of contributed integer values




– 
Form
a set of all contributed values




– 
Concatenate
bytes of all contributed values



n 
Plus, you can
create your own

