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cs.CC2014
A Parameterized Study of Maximum Generalized Pattern Matching Problems
Sebastian Ordyniak, Alexandru Popa
The generalized function matching (GFM) problem has been intensively studied starting with [Ehrenfeucht and Rozenberg, 1979]. Given a pattern p and a text t, the goal is to find a…
math.NT2014
On the trace formula for Hecke operators on congruence subgroups
Alexandru A. Popa
We give a new, simple proof of the trace formula for Hecke operators on modular forms for finite index subgroups of the modular group. The proof uses algebraic properties of certai…