Eichler cohomology theorem for automorphic forms of small weights
HTML articles powered by AMS MathViewer
- by Marvin Knopp and Henok Mawi PDF
- Proc. Amer. Math. Soc. 138 (2010), 395-404 Request permission
Abstract:
Let $\Gamma$ be an $H$-group. In 1974 Marvin Knopp conjectured that the Eichler cohomology group, with base space taken to be the set of all functions holomorphic in the upper half-plane, of polynomial growth at the real line (including $\infty$), and with a weight $k,$multiplier system $v$ linear fractional action of $\Gamma$, is isomorphic to the space of cusp forms on $\Gamma$ of weight $2-k$ and multiplier system $\overline {v}$, in the range $0<k<2$. In this article the authors prove the conjecture by making essential use of Hans Petersson’s “principal parts condition” for automorphic forms (1955).References
- M. Eichler, Eine Verallgemeinerung der Abelschen Integrale, Math. Z. 67 (1957), 267–298 (German). MR 89928, DOI 10.1007/BF01258863
- R. C. Gunning, The Eichler cohomology groups and automorphic forms, Trans. Amer. Math. Soc. 100 (1961), 44–62. MR 140126, DOI 10.1090/S0002-9947-1961-0140126-3
- Sufian Y. Husseini and Marvin I. Knopp, Eichler cohomology and automorphic forms, Illinois J. Math. 15 (1971), 565–577. MR 285733
- Marvin I. Knopp, Modular functions in analytic number theory, Markham Publishing Co., Chicago, Ill., 1970. MR 0265287
- Marvin I. Knopp, On the growth of entire automorphic integrals, Results Math. 8 (1985), no. 2, 146–152. MR 828936
- Marvin I. Knopp, Some new results on the Eichler cohomology of automorphic forms, Bull. Amer. Math. Soc. 80 (1974), 607–632. MR 344454, DOI 10.1090/S0002-9904-1974-13520-2
- M. I. Knopp, J. Lehner and W. Raji, Eichler cohomology for generalized modular forms, International Journal of Number Theory 5, no. 6, 2009, to appear.
- Joseph Lehner, Automorphic integrals with preassigned period polynomials and the Eichler cohomology, Computers in number theory (Proc. Sci. Res. Council Atlas Sympos. No. 2, Oxford, 1969) Academic Press, London, 1971, pp. 49–56. MR 0316387
- Douglas Niebur, Construction of automorphic forms and integrals, Trans. Amer. Math. Soc. 191 (1974), 373–385. MR 344196, DOI 10.1090/S0002-9947-1974-0344196-8
- Hans Petersson, Über automorphe Formen mit Sungularitäten im Diskontinuitätsgebiet, Math. Ann. 129 (1955), 370–390 (German). MR 71459, DOI 10.1007/BF01362378
- Atle Selberg, On the estimation of Fourier coefficients of modular forms, Proc. Sympos. Pure Math., Vol. VIII, Amer. Math. Soc., Providence, R.I., 1965, pp. 1–15. MR 0182610
- Xueli Wang, A conjecture on the Eichler cohomology of automorphic forms, Sci. China Ser. A 43 (2000), no. 7, 734–742. MR 1790176, DOI 10.1007/BF02878438
Additional Information
- Marvin Knopp
- Affiliation: Department of Mathematics, Temple University, Philadelphia, Pennsylvania 19122
- Henok Mawi
- Affiliation: Department of Mathematics, Temple University, Philadelphia, Pennsylvania 19122
- Received by editor(s): November 18, 2008
- Published electronically: October 2, 2009
- Communicated by: Wen-Ching Winnie Li
- © Copyright 2009 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 138 (2010), 395-404
- MSC (2000): Primary 11F12, 11F75
- DOI: https://doi.org/10.1090/S0002-9939-09-10070-9
- MathSciNet review: 2557156