[sympy] Re: Step-by-step Expression Manipulation

2014-01-30 Thread RAJAT AGGARWAL
Can somebody tell me what work has been done on this project and what kind of implementations have been done ? On Tuesday, January 28, 2014 10:24:08 PM UTC+5:30, RAJAT AGGARWAL wrote: Hi I was going through the GSoc 2014 Project Ideas Page, and i found an idea about the step-by-step

[sympy] Re: Step-by-step Expression Manipulation

2014-01-30 Thread Sergey Kirpichev
What we have in the BASH - we already have in the Python for years. Use something like pdb to debug the code. -- You received this message because you are subscribed to the Google Groups sympy group. To unsubscribe from this group and stop receiving emails from it, send an email to

[sympy] Re: Step-by-step Expression Manipulation

2014-01-30 Thread RAJAT AGGARWAL
What i meant with BASH debug thing is for user who are looking for the step wise solution of a problem, one like we do in out high school exams. and not like the debug thing because user need not to debug code.. On Thursday, January 30, 2014 5:06:15 PM UTC+5:30, Sergey Kirpichev wrote: What

Re: [sympy] Re: Logic Module

2014-01-30 Thread Sachin Joglekar
This may seem like an ad-hoc way of doing things, but can we think of using DNF for satisfiability of formulae with small number of atoms? Since DNF generally causes an extremely dangerous explosion in the size of an expression, its use to check satisfiability is usually frowned upon by the logic

Re: [sympy] GSoC 2014 - Implementation of Braid Groups and extensions to Knots

2014-01-30 Thread Amit Jamadagni
I have gone through the package and it seems to have integrated sage and SnapPy for computing Alexander's polynomial. They have used the idea of manifolds to implement (I would like to mention that my grasp of subject is not that far even though I understand the basics of manifold as a local

Re: [sympy] Group Theory-GSoC

2014-01-30 Thread Siddarth R
I am currently pursuing B.Sc in Mathematics and Computer Science. I have done some python programming in Group Theory but still working my way through SymPy. I have earlier coded in C and Haskell. Presently I am getting familiar with GAP and reading

Re: [sympy] Re: Logic Module

2014-01-30 Thread Soumya Biswas
Using Tseitin for small formulas with few arguments is an overkill. In such cases, switching to some other method sounds like a good idea. Will work on it and post the test results for comparison. -- You received this message because you are subscribed to the Google Groups sympy group. To

[sympy] Re: Step-by-step Expression Manipulation

2014-01-30 Thread Dhivya Sivasubramanian
Hi Rajat, I completely understand what you are looking for and I was also looking for some module like that in sympy. My application is to teach students engineering mathematics. I'd like a module that shows how sympy arrived at the final result . For example, how it simplified the

[sympy] Step-by-step thoughts

2014-01-30 Thread Matthew Rocklin
A few people have expressed interest in the step-by-step GSoC project. I've recently added a segment on the wiki about what I think is a sane and effective strategy for this problem. I've included the addition below for convenience.

Re: [sympy] Sympy gamma on hacker news

2014-01-30 Thread Aaron Meurer
In case people are curious, here is the Hacker News effect. The dip to zero was when we hit our pay quota. I guess now we need to improve Gamma more. And if you are interested, GSoC applications to work on Gamma (and/or Live) are welcome. Aaron Meurer On Wed, Jan 29, 2014 at 11:06 PM, David Li

Re: [sympy] Re: Logic Module

2014-01-30 Thread Aaron Meurer
I would time the various ways. Unless someone really understands the theory of DPLL well to know what will and won't be fast, I think this is the only way we can know what tricks to use when. In general, though, if something is only faster for very small inputs, it's not really worth doing,

[sympy] Re: Solve linear equation matrices

2014-01-30 Thread Sachin p
Why did you subtracted ? On Tuesday, January 28, 2014 12:31:52 PM UTC+5:30, Sachin p wrote: How to solve such kind of matrices(see attached pic) for each variable. I tried using solve_linear_sysem() but no success. Expected values: b1 = 0.6566 b2 = 0.7576 b3 = 0.6536 b4 = 0.0893 --

Re: [sympy] Re: Logic Module

2014-01-30 Thread Christian Muise
If the formulae are small, then the approach there is just fine. If the formulae is huge but the number of variables small, then just enumerating the models should be done. If neither of those cases hold, then the best you could hope for is to try and detect how far the input is from either CNF