Abstract
The occurence of conservation laws analogous to Lipkin's zilch is investigated for equations describing plane undamped waves without dispersion. The number of independent zilches and conservation laws is related in a simple way to the number of pairs of equal roots of the propagating matrix of the wave system.
| Original language | English |
|---|---|
| Pages (from-to) | 341-348 |
| Number of pages | 8 |
| Journal | Physica |
| Volume | 38 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1968 |