Physics – Mathematical Physics
Scientific paper
2007-11-28
SIGMA 4 (2008), 032, 13 pages
Physics
Mathematical Physics
This is a contribution to the Proc. of the Seventh International Conference ''Symmetry in Nonlinear Mathematical Physics'' (Ju
Scientific paper
10.3842/SIGMA.2008.032
We argue that the variational calculus leading to Euler's equations and
Noether's theorem can be replaced by equivariance and invariance conditions
avoiding the action integral. We also speculate about the origin of Lagrangian
theories in physics and their connection to Feynman's integral.
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