We compare modular forms of characteristic $p>0$ (i.e. Drinfeld's modular forms) and automorphic forms. We prove that spaces of these modular forms (which are of characteristic $p$) can be described by function spaces of characteristic zero, close to those of automorphic forms.
Invariants, cohomology, and automorphic forms of higher order
Weights, raising and lowering operators, and K-types for automorphic forms on SL(3,R)
Mass Equidistribution for Automorphic Forms of Cohomological Type on GL_2
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