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Sep 16, 2014 at 16:25 comment added Asaf one of the definitions of a rank of symmetric space is the rank of the group from which the symmetric space is formed, so indeed, SO(1,n) are rank $1$. For higher rank, Quint proved analogues of PS for Schottky groups in his PhD thesis (which are doable due to the symbolic coding), and I think some results in the general case were proven by Albuquerque.
Sep 16, 2014 at 15:57 comment added Hao Chen @Asaf, what do you mean by rank 1 spaces? Do you mean pseudo-Euclidean spaces of signature (1,n)? I am indeed interested to know more about any sort of P-S theory in spaces of signature (p,q).
Sep 16, 2014 at 15:55 vote accept Hao Chen
Sep 14, 2014 at 10:02 comment added Asaf The dimension=exponent part should be known from some sort of Patterson-Sullivan theory, as some integrability condition for proper Poincare series, especially if you're interested in only rank $1$ spaces. I would check Oh's papers, especially the papers with Mohammadi (If I recall correctly the first counting result was achieved with Kontorovich, and the second one with Mohammadi). McMullen have done some work computing dimensions as well (late 90's or so).
Aug 15, 2014 at 9:34 answer added Hao Chen timeline score: 1
Aug 13, 2014 at 15:17 history edited Hao Chen CC BY-SA 3.0
add two labels and minor changes.
Jul 10, 2014 at 22:50 history asked Hao Chen CC BY-SA 3.0