On Mon, Apr 15, 2013 at 12:15 PM, Alan Bromborsky <abro...@verizon.net> wrote: > On 04/15/2013 12:10 PM, Julien Rioux wrote: > > > > On Sunday, 14 April 2013 11:49:15 UTC-4, F. B. wrote: >> >> Hi there! >> >> I noticed the function sympy.physics.matrices.mgamma returns Dirac bases >> for gamma matrices. What if someone wants to operate in other bases? > > > I think it would just be more confusing to put those in the library code; > It's easy enough for users to define the 4x4 matrices they want to use in > their own code. More interesting, to me anyway, would be to be able to work > with the Dirac algebra (having objects that obey the commutation relations) > without describing explicitly which matrix form you choose for these > objects. I think this is what https://github.com/sympy/sympy/pull/1635 > started to do. > > Cheers, > Julien > -- > 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+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at http://groups.google.com/group/sympy?hl=en-US. > For more options, visit https://groups.google.com/groups/opt_out. > > > > Attached is a description of the rewrite of the geometric algebra module for > sympy (sympy pull request 1937, more up to date documentation in pull). > Especially look at the example of the Dirac equation at the end of GA.pdf.
How much of this document is included in the pull request? Is it just a copy from the Sphinx docs? I have started reviewing the code. Unfortunately, I can only provide overarching comments on things like style and API usage because I don't know how the math works. Maybe you could find all the people who have contributed to the module in the past on GitHub and ping them to review it (write a comment on the pull request with their usernames with an @ before it, like @brombo. This will subscribe them to email updates on the pull request). Aaron Meurer > > > I more complete discription of geometric algebra can be found at - > > http://montgomerycollege.edu/Departments/planet/planet/Numerical_Relativity/Cliff.html > > Goto link bookGA.pdf and look at multipliction table on page 13. > > In the geometric algebra of space time the \gamma_mu are the basis vectors > for the 4D Minkowski space for spacetime. Under the geometric product the > basis vectors obey the commutation relations of the Dirac matrices. > > -- > 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+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at http://groups.google.com/group/sympy?hl=en-US. > For more options, visit https://groups.google.com/groups/opt_out. > > -- 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+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
