Since the result of action of operator ∂ 2 ∂x$_{i}$∂x$_{k}$ (symmetric with respect to indexes i, k ) on antisymmetric tensor F ik A$_{e}$ (similar to any convolution of symmetric tensor with the antisym- metric one) identically equals 0, the continuity equation describing the charge conservation law follows from (4b): In quantum field theory, equation (4b) is replaced, according to definition (1), by the following equation: In the equation (4a) instead of tensor F$_{A}$$_{e}$ pseudo-tensor dual to tensor F$_{A}$$_{e}$ , may be used, where e iklm is the absolutely antisymmetric, unit, four- dimensional pseudo-tensor of the fourth rank with weight W = +1, which components change their signs with permutation of any two indexes and by definition (pseudo-tensor e$_{iklm}$ has weight W = − 1 and e 0123 = − 1). With x coordinate system replaced by ¯ x coordinate system (caused by changes in the basis of n -dimensional vector space), components of pseudo-tensor T of weight W , which is r -times contra-variant and s -times co-variant, are transformed according to the law (see, for example, [9]): In contrast to the ordinary tensor’s component transformation, there is a factor in the form of Jacobian of coordinate transformation of power W in equation (9). By virtue of such factor components of tensor F$_{A}$$_{e}$ and (dual to them) components of pseudo-tensor F ⋆ $_{A$_{e}$}$, dual to F$_{A}$$_{e}$ , are transformed in the same way ∂F ik A$_{e}$ ∂x$_{k}$ = − 4 π c j i $_{e}$. (4b) ∂j i e ∂x i = 0 . (5) − ∂$_{k}$∂ $^{k}$Ai e + ∂$_{k}$∂ $^{i}$Ak e ≡ □ A i e + ∂$_{k}$∂ $^{i}$Ak e = − 4 π c j i $_{e}$. (6) F ⋆ ik A$_{e}$ ≡ 1 2! e $^{iklm}$F$_{A}$$_{e}$$_{lm}$ , (7) e 0123 ≡ +1 , (8) ¯ T k$_{1}$k$_{2}$...k$_{r}$ k ′ $_{1}$k ′ $_{2}$...k ′ s ≡ ∂ ¯ x k$_{1}$ ∂x i$_{1}$ ∂ ¯ x k$_{2}$ ∂x i$_{2}$ · · · ∂ ¯ x k$_{r}$ ∂x i$_{r}$ ∂x i ′ 1 ∂ ¯ x k ′ 1 ∂x i ′ 2 ∂ ¯ x k ′ 2 · · · ∂x i ′ s ∂ ¯ x k ′ s T i$_{1}$i$_{2}$...i$_{r}$ i ′ $_{1}$i ′ $_{2}$...i ′ s J $^{W}$. (9) J = ∂ ( x $^{0}$, x$^{1}$, . . . , x n$_{−}$ $^{1}$) ∂ (¯ x $^{0}$, ¯ x $^{1}$, . . . , ¯ x n$_{−}$ $^{1}$) | J | = √ − g = 1 (10) 4