Manuscript X-C@3 · X-C-v3.tex · section · 2260f5f8

Yang–Feldman characterization and quantum order

Yang–Feldman characterization and quantum order · lines 943–962

The leg count does not construct time-ordered products or license unanalysed diagonal extensions. The maps are defined by (eq:moller) and characterized by Theorem thm:yf; the count explains why that restricted construction has the stated quantum order. No cancellation theorem for an unconstructed $T_{2}, T_{3}$ programme is used.

Scalar-independent changes of quadratic Wick ordering have zero first field derivative and do not change these linear responses. Nor does tree-exactness make $R_{q}$ a map on free on-shell inputs:

R_{q} (P_{m} v) = P_{m} v - L [q] v + L [q] E_{m}^{A} L [q] v,

whose class can be nonzero. The warning about actual intermediate tests remains in force.

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$R_{q} (P_{m} v) = P_{m} v - L [q] v + L [q] E_{m}^{A} L [q] v,$

Yang–Feldman characterization and quantum order

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