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math-ph2011★ 29 cited
Counting master integrals: integration by parts vs. differential reduction
Mikhail Yu. Kalmykov, Bernd A. Kniehl
The techniques of integration by parts and differential reduction differ in the counting of master integrals. This is illustrated using as an example the two-loop sunset diagram wi…
math-ph2011★ 9 cited
Lorentz Harmonics, Squeeze Harmonics, and their Physical Applications
Young S. Kim, Marilyn E. Noz
Among the symmetries in physics, the rotation symmetry is most familiar to us. It is known that the spherical harmonics serve useful purposes when the world is rotated. Squeeze tra…