About the Hertz vector
As is known, solution of many electrodynamic problems (including the problems associated with wave transmission in the presence of guiding systems and waveguides) can be significantly facilitated with the introduction of vector function П - the Hertz vector, by which A vector and φ scalar field potentials can be expressed. However, in doing so, the Hertz vector is often quite artificially and sometimes not correctly introduced. Therefore, a logically non-contradictory way of introducing the Hertz vector is proposed.