Thanks much for your note. What surprises me is that sum() doesn't need coercion to sage integers when working with int-typed variables and numbers:
sum(k, k, 1, 10) # ok n = 10; sum(k, k, 1, n) # ok I couldn't figure out the code path that looks for this difference. How does the sum 'know' that it is being invoked inside a loop? The parse tree for sum should be no different. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
