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Källén–Lehmann conjecture for Euclidean-sphere two-point functions
Let $G_{\mathcal{O}}$ be a scalar two-point function on the Euclidean sphere satisfying the stated Euclidean assumptions: it is regular at non-coincident points, $SO(d+2)$ -invarian…
Conjectureopende-sitter-space spectral-representations two-point-functionsarXiv posted 2 days ago

Källén–Lehmann conjecture for Euclidean-sphere two-point functions