start-ver=1.4 cd-journal=joma no-vol=263 cd-vols= no-issue= article-no= start-page=133 end-page=166 dt-received= dt-revised= dt-accepted= dt-pub-year=2023 dt-pub=20230816 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=The universal factorial Hall?Littlewood P- and Q-functions en-subtitle= kn-subtitle= en-abstract= kn-abstract=We introduce factorial analogues of the ordinary Hall?Littlewood P- and Q-polynomials, which we call the factorial Hall?Littlewood P- and Q-polynomials. Using the universal formal group law, we further generalize these polynomials to the universal factorial Hall?Littlewood P- and Q-functions. We show that these functions satisfy the vanishing property which the ordinary factorial Schur S-, P-, and Q-polynomials have. By the vanishing property, we derive the Pieri-type formula and a certain generalization of the classical hook formula. We then characterize our functions in terms of Gysin maps from flag bundles in complex cobordism theory. Using this characterization and Gysin formulas for flag bundles, we obtain generating functions for the universal factorial Hall?Littlewood P- and Q-functions. Using our generating functions, we show that our factorial Hall?Littlewood P- and Q-polynomials have a certain cancellation property. Further applications such as Pfaffian formulas for K-theoretic factorial Q-polynomials are also given. en-copyright= kn-copyright= en-aut-name=NakagawaMasaki en-aut-sei=Nakagawa en-aut-mei=Masaki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=NaruseHiroshi en-aut-sei=Naruse en-aut-mei=Hiroshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil=Graduate School of Education Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Education University of Yamanashi kn-affil= en-keyword=factorial Hall-Littlewood P-and Q-functions kn-keyword=factorial Hall-Littlewood P-and Q-functions en-keyword=generating func-tions kn-keyword=generating func-tions en-keyword=formal group laws kn-keyword=formal group laws en-keyword=complex cobordism theory kn-keyword=complex cobordism theory en-keyword=Gysin formulas kn-keyword=Gysin formulas END