The Siegel modular variety of degree two and level four. Memoirs of the American Mathematical Society; 631.

Lee, Ronnie; Weintraub, Steven H.; Hoffman, Jerome William

ISBN 10: 0821806203 / ISBN 13: 9780821806203

Published by Providence, 1998

About this Item

Ehem. Bibliotheksexemplar mit Signatur und Stempel. GUTER Zustand, ein paar Gebrauchsspuren. Ex-library with stamp and library-signature. GOOD condition, some traces of use. C-00833 9780821806203 Sprache: Englisch Gewicht in Gramm: 150.

Seller Inventory # 2484671

Bibliographic Details

• Title: The Siegel modular variety of degree two and level four. Memoirs of the American Mathematical Society; 631.
• Publisher: Providence
• Publication Date: 1998
• Language: English
• ISBN 10: 0821806203
• ISBN 13: 9780821806203
• Binding: Softcover
• Seller catalogs:
  • SA MATHEMATIK

About this title

Synopsis

The Siegel Modular Variety of Degree Two and Level Four is by Ronnie Lee and Steven H. Weintraub: Let $\mathbf M_n$ denote the quotient of the degree two Siegel space by the principal congruence subgroup of level $n$ of $Sp_4(\mathbb Z)$. $\mathbfM_n$ is the moduli space of principally polarized abelian surfaces with a level $n$ structure and has a compactification $\mathbfM^*_n$ first constructed by Igusa. $\mathbfM^*_n$ is an almost non-singular (non-singular for $n> 1$) complex three-dimensional projective variety (of general type, for $n> 3$). The authors analyze the Hodge structure of $\mathbfM^*_4$, completely determining the Hodge numbers $h^{p,q} = \dim H^{p,q}(\mathbfM^*_4)$. Doing so relies on the understanding of $\mathbfM^*_2$ and exploitation of the regular branched covering $\mathbfM^*_4 \rightarrow \mathbfM^*_2$.""Cohomology of the Siegel Modular Group of Degree Two and Level Four"" is by J. William Hoffman and Steven H. Weintraub. The authors compute the cohomology of the principal congruence subgroup $\Gamma_2(4) \subset S{_p4} (\mathbb Z)$ consisting of matrices $\gamma \equiv \mathbf 1$ mod 4. This is done by computing the cohomology of the moduli space $\mathbfM_4$. The mixed Hodge structure on this cohomology is determined, as well as the intersection cohomology of the Satake compactification of $\mathbfM_4$.