54567 Rar -

The value is recorded as a spectral line value (specifically

These notes were part of a collection of unpublished theoretical physics research by Majorana, which were later compiled and published as a book by Springer Nature . 54567 rar

In the mathematical and physical context of these notes, "rar" often appears in formulas related to spectral analysis and atomic energy levels (e.g., The value is recorded as a spectral line