IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
permute sum11 1. n : 2. (n-1) List
f:(n). sum(f(compose_flips(nil)(x)) | x < n) = sum(f(x) | x < n)
By:
Unfold `compose_flips` 0 THEN Reduce 0
Generated subgoals:
None
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
f:(
). sum(f(compose_flips(nil)(x)) | x < n) = sum(f(x) | x < n)
