M. Shub, B. Weiss
Ergodic Theory and Dynamical Systems
We use geometric algebra and the theory of automorphic forms to realize theta series attached to an indefinite quadratic form as the sum of a specific Eisenstein series and an L2-function. From this we obtain explicit formulas for the measure of the representation of an integer by an indefinite quadratic form.
M. Shub, B. Weiss
Ergodic Theory and Dynamical Systems
Simeon Furrer, Dirk Dahlhaus
ISIT 2005
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Quantum Machine Intelligence
Tong Zhang, G.H. Golub, et al.
Linear Algebra and Its Applications