Re: hadamard finite part
- To: mathgroup at smc.vnet.net
- Subject: [mg67986] Re: hadamard finite part
- From: Rolf.Mertig at gmail.com
- Date: Thu, 20 Jul 2006 06:04:20 -0400 (EDT)
- References: <e9ibvc$52e$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, not quite as general as you may need it, but Hadamard integration is used in Quantum Field Theory a lot since a long time and implemented e.g. in FeynCalc ( for Feynman integrals), see: http://www.feyncalc.org/FeynCalcBook/Integrate2 http://www.feyncalc.org/FeynCalcBook/Integrate3 http://www.feyncalc.org/FeynCalcBook/PlusDistribution All this is rather basically programmed as a smart table-lookup. Just look at the source code. I tried once to implement more of distribution theory, but it is tricky and I found Mathematica extremely well-suited for table-lookup-algorithm-implementation. I.e., you work out what you want, calculate the basic building blocks once (by hand etc.) and let Mathematica just do the algebra but not the complicated mathematics. Regards, Rolf Mertig GluonVision GmbH, Berlin, Mathematica training & consulting http://www.gluonvision.com