The Siegel Modular Variety of Degree Two and Level Four/Cohomology of the Siegel Modular Group of Degree Two and Level Four 

Author:
 Lee, Ronnie Weintraub, Steven H. Hoffman, J. William 
Series title:  Memoirs of the American Mathematical Society Ser. 
ISBN:  9780821806203 
Publication Date:  Apr 1998 
Publisher:  American Mathematical Society

Book Format:  Paperback 
List Price:  AUD $68.20 
Book Description:

Computes the cohomology of the principal congruence subgroup $\Gamma_2(4) \subset S{{_p4}} (\mathbb Z)$ consisting of matrices $\gamma \equiv \mathbf 1$ mod 4.
Computes the cohomology of the principal congruence subgroup $\Gamma_2(4) \subset S{{_p4}} (\mathbb Z)$ consisting of matrices $\gamma \equiv \mathbf 1$ mod 4.