Main public logs

Combined display of all available logs of Geometry of Differential Equations. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

• 21:02, 13 October 2025 Verbovet talk contribs created page Seminar talk, 22 October 2025 (Created page with "{{Talk | speaker = Vladimir Rubtsov | title = Källén function and around | abstract = There are elementary functions that turn out to be ubiquitous. The Cullen function is one of them. Of course, it is incomparably less well-known than the exponential function (although, in a certain sense, it is related to it). Originally arising in "school-textbooks" mathematics, the Källén function was later "rediscovered" by physicists in the context of scattering amplitude cal...")