A. Hurwitz and the Origins of Random Matrix Theory in Mathematics
نویسندگان
چکیده
The purpose of this article is to put forward the claim that Hurwitz’s paper “Über die Erzeugung der Invarianten durch Integration.” [Gött. Nachrichten (1897), 71-90] should be regarded as the origin of random matrix theory in mathematics. Here Hurwitz introduced and developed the notion of an invariant measure for the matrix groups SO(N) and U(N). He also specified a calculus from which the explicit form of these measures could be computed in terms of an appropriate parametrisation — Hurwitz chose to use Euler angles. This enabled him to define and compute invariant group integrals over SO(N) and U(N). His main result can be interpreted probabilistically: the Euler angles of a uniformly distributed matrix are independent with beta distributions (and conversely). We use this interpretation to give some new probability results. How Hurwitz’s ideas and methods show themselves in the subsequent work of Weyl, Dyson and others on foundational studies in random matrix theory is detailed.
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