“…[14,15]: the Latin indices (i, j, k, ...) refer to the local Lorentz frame, the Greek indices (µ, ν, ρ, ...) refer to the coordinate frame, and both run over 0, 1, 2; η ij = (+, −, −) and g µν = b i µ b j ν η ij are metric components in the local Lorentz and coordinate frame, respectively; totally antisymmetric tensor ε ijk and the related tensor density ε µνρ are both normalized by ε 012 = +1.…”