> Sorry if i am stating the obvious here, the reason is that i am trying > to explain why i think it should be (either implicit or explicit) > clear over which algebraic structure is computed.
Generally it is -- try parent(foo) or foo.parent() to see what "algebraic structure" is in play. sage: Zmod(5)(1).parent() Ring of integers modulo 5 sage: (Zmod(5)(-1) * sin(x)) 4*sin(x) sage: (Zmod(5)(-1) * sin(x))^2 sin(x)^2 sage: (Zmod(5)(-1) * sin(x)).parent() Symbolic Ring Now this is irritating, perhaps, but there is no way to avoid this given the "parents with objects" approach that Sage subscribes to: sage: t = (Zmod(5)(3) * sin(x))^2 sage: t 4*sin(x)^2 sage: t.operands() [sin(x)^2, 4] sage: t.operands()[-1] 4 sage: t.operands()[-1].parent() Symbolic Ring sage: t.operands()[-1].pyobject().parent() Ring of integers modulo 5 So the algebraic structure really is there, it's just that the "Symbolic Ring" algebraic structure is very permissive: it's not really "algebraic" in a mathematical sense. Nick --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
