Vol. 247, No. 2, 2010

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Representations of the two-fold central extension of SL2(2)

Hung Yean Loke and Gordan Savin

Vol. 247 (2010), No. 2, 435–454
Abstract

We define a notion of pseudospherical type for smooth representations of the nontrivial two fold central extension of SL2(2). We describe completely the irreducible representations that contain the pseudospherical type. We relate our results to Kohnen’s plus and minus spaces of classical modular forms of half integral weight.

Keywords
modular forms, Shimura correspondence, Hecke algebra, pseudospherical representations
Mathematical Subject Classification 2000
Primary: 11F70, 22E50, 22E55
Milestones
Received: 20 July 2009
Accepted: 25 September 2009
Published: 11 August 2010
Authors
Hung Yean Loke
National University of Singapore
10, Lower Kent Ridge Road
Singapore 119076
Singapore
http://www.math.nus.edu.sg/~matlhy/
Gordan Savin
Department of Mathematics
University of Utah
Salt Lake City, UT 84112
United States
http://www.math.utah.edu/~savin/