Hello, Is it possible to compose/iterate functions in sage by a functional way without any loop for or while.
When I used mupad I could get the u(100) term of this sequence by : (sin@@100) (1) # u(0)=1 and u(n+1)=sin (u(n)) What does sage propose ? (without any loop) An other question : How can I insert a test in a map(anonymous function) or [calculus for x in list]. I can do it when I declare a external new function, but I can't inside the map or the [calculus in list] if...then...else in Maple, Mupad or Axiom send a result. Even with a return I can't do it in lambda. This mupad-command creates a tridiagonal matrix : matrix (4,4, (i,j)->if abs (i-j) <= 1 then 1 else 0 end_if) How can I do with sage. F. --~--~---------~--~----~------------~-------~--~----~ 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 URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
