Scaling degree and unique minimal extension

The uniqueness is coefficientwise and normalization-specific. A weaker total engineering-dimension condition may admit additional terms. A change of the Wick stress, such as an improvement term, changes the named vertex rather than this extension problem. The contact $P{W}_m^{\mathrm{F}}=i\delta$ appears after applying a field equation; it is fixed by (eq:Widentities), not an independent coefficient.

Figure fig:subcritical-extension illustrates the coefficientwise subcritical extension argument of BF.