Regularization by $\varepsilon$-metric. II. Limit $\varepsilon = + 0$

Understand

In a wide class of propagators regularized by the $\varepsilon$-metric [1], the $R$-operation is formulated.

• It is proved that the limit of renormalized Feynman integrals exists and is covariant.
• Possible applications in gravity are discussed.
• (The paper is an English translation of the second of two articles in Russian published by the author in 1987-88: V.D.