The one page TELEGRAPH manual
Tallinn University of Technology,
Received 10 September 2015; Revised 21 December 2015
Selected useful facts about the well known telegraph equation are concisely listed. Its integrability is considered. It is shown how the particular solutions can be represented as the pairs, where one element is the Bessel function $J_0$. The relation of the pairs to the telegraphic Klein-Gordon equation is explicitly explained. One can say that the telegraph equation is in a sense analog of the Dirac equation revealing its telegraphic mass and spin in a particular pairing.
1 pp, 5 Refs
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