Counting absolutely cuspidals for quivers
2019
For an arbitrary quiver $$Q=(I,\Omega )$$
and dimension vector $$\mathbf {d} \in \mathbb {N}^I$$
we define the dimension of absolutely cuspidal functions on the moduli stacks of representations of dimension $$\mathbf {d}$$
of a quiver Q over a finite field $$\mathbb {F}_q$$
, and prove that it is a polynomial in q, which we conjecture to be positive and integral. We obtain a closed formula for these dimensions of spaces of cuspidals for totally negative quivers.
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