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...Legendre [[ordinary differential equation]] is frequently encountered in [[physics]] and other technical fields. In particular, it occurs when solving [[Lapla ...this we have Gaunt's formula <ref>From John C. Slater ''Quantum Theory of Atomic Structure'', McGraw-Hill (New York, 1960), Volume I, page 309, which cites ...

In physics, Wigner's '''9-''j'' symbols''' were introduced by [[Eugene Paul Wigner]] i ...= Condon |first= Edward U. |author2= Shortley, G. H. |title= The Theory of Atomic Spectra |url= https://archive.org/details/in.ernet.dli.2015.212979 |year= 1 ...

...lisher=Amsterdam|location=in Spectroscopy and Group Theoretical Methods in Physics}}</ref> and later proven by Roberts.<ref>{{cite journal|last=Roberts J|titl ...= Condon |first= Edward U. |author2= Shortley, G. H. |title= The Theory of Atomic Spectra |chapter-url= https://archive.org/details/in.ernet.dli.2015.212979 ...

...edenharn|L. C. Biedenharn]] and J. D. Louck, ''Angular Momentum in Quantum Physics'', volume 8 of Encyclopedia of Mathematics, Addison-Wesley, Reading, 1981. ...to the configuration interaction and perturbation theory calculations for atomic and molecular systems ...

...ll Dirac delta function model]] for equal charges—a fundamental problem in physics—Corless and developers of the [[Maple software|Maple]] computer algebra sys ...he Lambert ''W'' Function and Its Applications to Mathematical Problems of Physics (in Russian) ...