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math.NT2026
Iterated integrals for generalized Appell functions
Aradhita Chattopadhyaya, Jan Manschot
Appell functions are a large class of multi-variable quasi-elliptic functions, which are also instances of higher depth mock modular forms. A central aspect of these functions is t…
hep-th2026
Remarks on Vafa-Witten theory, or how to sit on a wall
Sergei Alexandrov, Aradhita Chattopadhyaya
We prove three results about refined VW invariants on Hirzebruch surfaces. First, we crucially simplify the modular anomaly equation satisfied by the generating series of t…