is mentioned by
Thm* (x:n, y:m. f(x,y) = g(x,y)) Thm* Thm* sum(f(x,y) | x < n; y < m) = sum(g(x,y) | x < n; y < m) | [double_sum_functionality] |
Thm* sum(f(x,y)-g(x,y) | x < n; y < m) = d Thm* Thm* sum(f(x,y) | x < n; y < m) = sum(g(x,y) | x < n; y < m)+d | [double_sum_difference] |
Thm* x1 = x2 y1 = y2 Thm* Thm* (x:n, y:m. (x = x1 & y = y1) (x = x2 & y = y2) f(x,y) = 0) Thm* Thm* sum(f(x,y) | x < n; y < m) = f(x1,y1)+f(x2,y2) | [pair_support_double_sum] |
Try larger context:
MarkB generic
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html