47 citations · 57 across the 3 of their papers we have counts for
Showing gr-qcShow all
2 papers · 1 filter
gr-qc2004★ 10 cited
Quantum general relativity and the classification of smooth manifolds
Hendryk Pfeiffer
The gauge symmetry of classical general relativity under space-time diffeomorphisms implies that any path integral quantization which can be interpreted as a sum over space-time ge…
gr-qc2002
Positivity of relativistic spin network evaluations
Hendryk Pfeiffer
Let G be a compact Lie group. Using suitable normalization conventions, we show that the evaluation of GxG-symmetric spin networks is non-negative whenever the edges are labeled by…