Counting integral matrices with a given characteristic polynomial

Details Counting integral matrices with a given characteristic polynomial Counting integral matrices with a given characteristic polynomial

2000-02-22

arxiv.org/abs/math/0002179v1

Sankhya Ser. A 62 (2000), no. 3, 386--412 : Special Issue on Ergodic theory and Harmonic analysis, Mumbai (1999).

Mathematics

Representation Theory

Scientific paper

We give a simpler proof of an earlier result giving an asymptotic estimate for the number of integral matrices, in large balls, with a given monic integral irreducible polynomial as their common characteristic polynomial. The proof uses equidistributions of polynomial trajectories on SL(n,R)/SL(n,Z), which is a generalization of Ratner's theorem on equidistributions of unipotent trajectories. We also compute the exact constants appearing in the above mentioned asymptotic estimate.

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