Special functions 2026-02-16T04:09:01+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Andrews, George E., 1938-; Askey, Richard; Roy, Ranjan, 1948- (Encyclopedia of mathematics and its applications ;, 2000)