3 problems
Let denote the universal cover of anti-de Sitter space, and let be the invariant anti-de Sitter quantity appearing in the Gegenbauer kernels. For the relevant parameter…
Let be the spacetime dimension, let satisfy … and let , , , and be the invariant…
Källén–Lehmann spectrum conjecture. The free scalar propagator on has a Källén–Lehmann power spectrum equivalent to