On Mon, Nov 10, 2008 at 8:31 PM, Ondrej Certik <[EMAIL PROTECTED]> wrote: > On Mon, Nov 10, 2008 at 8:16 PM, Brian Granger <[EMAIL PROTECTED]> wrote: >> >> Hi, >> >> By default, Python's * operator work in L->R order, so: >> >> a*b*c*d = ((a*b)*c)*d >> >> But, I am implementing some operators from quantum mechanics that I >> want to apply like this: >> >> a*b*c*d = a*(b*(c*d)) >> >> Is this possible with sympy? In my case, a, b, c, and d are custom >> subclasses of Basic that don't commute. I would like to do this using >> a custom __mul__ method on my class, but I am not sure that will work. >> >> Any thoughts? > > Could you please elaborate? What you want is a noncommutative > *nonassociative* algebra. As far as I know, everything in quantum > mechanics is at least associative.
Or do you want to implement something like nested functions calls: f(g(h(x))) but write it as f * g * h (x) or something like that? But still I think this is associative, isn't it? Ondrej --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
