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math.QA2019★ 3 cited
BRST Reduction of Quantum Algebras with -Involutions
Chiara Esposito, Andreas Kraft, Stefan Waldmann
In this paper we investigate the compatibility of the BRST reduction procedure with the Hermiticity of star products. First, we introduce the generalized notion of abstract BRST al…
math.QA2019★ 4 cited
Convergence of Star Product: From Examples to a General Framework
Stefan Waldmann
We recall some of the fundamental achievements of formal deformation quantization to argue that one of the most important remaining problems is the question of convergence. Here we…