Robuta

https://www.ijmrd.in/index.php/imjrd/article/view/5221/6116 View of THE INVERSE PROBLEM OF DETERMINING THE COEFFICIENT FOR THE WAVE PROPAGATION EQUATION inverse problem wave propagation view determining coefficient https://mpusz.github.io/mp-units/HEAD/reference/systems_reference/hierarchies/propagation_coefficient_isq/ propagation_coefficient (isq) - mp-units The quantities and units library for C++ propagation coefficient isq units