**Next message:**C Y: "Re: [Maxima] Re: [Axiom-developer] Re: FeynCalc -> MAXIMA"**Previous message:**C Y: "Re: [Axiom-developer] FeynCalc -> MAXIMA"**In reply to:**Bob McElrath: "Re: [Axiom-developer] Re: FeynCalc -> MAXIMA"**Next in thread:**Camm Maguire: "Re: [Axiom-developer] Re: FeynCalc -> MAXIMA"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

--- Bob McElrath <bob+maxima@mcelrath.org> wrote:

*> The *purpose* of FeynCalc is to be a general purpose framework
*

*> for doing quantum field theory calculations. That is, dirac
*

*> matrices, trace rules, Feynman rules from Lagrangians,
*

*> representations for fields and the like.
*

This brings up an interesting point. Much of the discussion so far has

been on how to incorporate new knowledge into Axiom/etc as it is

discovered/created, but for a lot of uses the PRACTICAL value of a CAS

is doing repeated calculations within a subset of mathematics.

Modeling physical systems, for example, most likely allows one to make

some assumptions that a general purpose CAS wouldn't or shouldn't make.

If Axiom is to be useful to people in a field outside pure mathematical

research (such as high energy physics) there should be a way for them

to have a HighEnergyPhysics.pamphlet file or some such that immediately

lets Axiom know about the standard assumptions in the field. That way,

anyone wanting to write a paper using Axiom in the HighEnergyPhysics

field could simply load that file and have a mathematical environment

corresponding to the one they use to do their work. I guess Feyncalc

in a sense is such a tool for Mathematica, but given the strictness of

Axiom's environment I wouldn't be surprised if Feyncalc itself might

benefit from a more general definition file.

*> The actual algorithms are straightforward, but very tedious to
*

*> calculate, so thus the results are collected into libraries like
*

*> FeynCalc.
*

Perhaps it would be useful to make the distinction between mathematical

research using a CAS and the CAS as a scientific tool. Axiom clearly

wants to be a mathematical research level CAS - does it make sense to

add abilities which are mostly practical in nature? I.e., would Axiom

want to be the place to do quick calculations for a physics paper, as

well as an environment to interact with high level mathematical

research? I don't think the two are mutually exclusive, but I'm

thinking there does need to be a way for the casual user to be isolated

from advanced mathematical issues and define a more confined working

environment.

CY

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