On Wednesday, July 16, 2014 8:35:49 PM UTC-7, James Crist wrote:
On Friday, July 11, 2014 11:13:28 PM UTC-5, Richard Fateman wrote:
The obvious brute force method would be to use software floats in which
case you could increase the precision and the range of the
numbers involved. I'm
On Fri, Jul 18, 2014 at 6:38 AM, F. B. franz.bona...@gmail.com wrote:
On Friday, July 18, 2014 5:05:37 AM UTC+2, Ondřej Čertík wrote:
This is also the sort of thing that would benefit from a performant
core.
We would write patterns in SymPy and then match them using some C++
matching
Hello,
I'm using the replace method to substitute a function symbol with a
python lambda function, but this process is failing to respect
non-commutativity. This can be seen with a simple example:
import sympy as sy
x, y = sy.symbols('x, y', commutative=False)
f = sy.Function('f')
On Thursday, July 17, 2014 7:07:19 PM UTC-7, Matthew wrote:
The benefit of pattern matching is that 1 complex if-then-else
constructions are hard to write well.
Writing 10,000 rules and being sure that you have 100% coverage of all
possible case and no overlap is
a challenge. It's
On Fri, Jul 18, 2014 at 10:26 AM, Richard Fateman fate...@gmail.com wrote:
On Wednesday, July 16, 2014 8:35:49 PM UTC-7, James Crist wrote:
On Friday, July 11, 2014 11:13:28 PM UTC-5, Richard Fateman wrote:
The obvious brute force method would be to use software floats in which
case you
It looks like it's because when simultaneous=True (the default), it
uses Dummy symbols, which do not keep the assumptions of the symbols
they replace. If you set simultaneous=False, it works correctly.
Aaron Meurer
On Fri, Jul 18, 2014 at 1:52 PM, Keaton Burns keaton.bu...@gmail.com wrote:
Thanks, that's working great. Is there a reason not to just pass the
commutative assumptions to the dummy variables, with d =
Dummy(commutative=expr.is_commutative)? This seems to work for my cases.
On Friday, July 18, 2014 9:18:46 PM UTC-4, Aaron Meurer wrote:
It looks like it's because
Yes, it should do it. It was just an oversight I'm sure. Maybe Symbol
should have an as_dummy method for such situations that produces a
Dummy variable with the same assumptions.
Aaron Meurer
On Fri, Jul 18, 2014 at 8:54 PM, Keaton Burns keaton.bu...@gmail.com wrote:
Thanks, that's working
And of course, after I type that, I check, and I see that that exact
thing is already implemented. So it should be using that.
Aaron Meurer
On Fri, Jul 18, 2014 at 10:56 PM, Aaron Meurer asmeu...@gmail.com wrote:
Yes, it should do it. It was just an oversight I'm sure. Maybe Symbol
should have
