Dear all, I have modified the function minimal_dim in idx.cpp so that non-numerical dimensions do not have to be symbols. For instance minimal_dim(4,4-2*delta) will return 4. Generally a numeric dimension will always be considered smaller than a non-numeric dimension. This makes sense in the context of dimensional regularization. Best wishes, Chris
Chris Dams wrote:
Generally a numeric dimension will always be considered smaller than a non-numeric dimension. This makes sense in the context of dimensional regularization.
Does it? Why? curious -richy. -- Richard B. Kreckel <http://www.ginac.de/~kreckel/>
Dear Richy, On Tue, 2006-01-10 at 22:01 +0100, Richard B. Kreckel wrote:
Generally a numeric dimension will always be considered smaller than a non-numeric dimension. This makes sense in the context of dimensional regularization.
Does it? Why?
Because when defining integration in an arbitrary number of dimensions, as it is done in the book "Renormalization" by Collins, vectors are considered to have an infinite number of components as in p(p_1, p_2, ...). Therefore projection on, say, 4 components reduces the number of them. Best, Chris
participants (2)
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Chris Dams
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Richard B. Kreckel