@article{Yehorchenko_Vorobyova_2022, title={Conditional and hidden infinite-dimensional symmetries of wave equations}, volume={74}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/7035}, DOI={10.37863/umzh.v74i3.7035}, abstractNote={<p>UDC 517.9</p> <p>We consider conditional and hidden symmetry of multidimensional wave equations that are generated by additional conditions. <br>An additional condition that corresponds to the dilation operator generates an infinite-dimensional symmetry for the wave equation.</p&gt;}, number={3}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Yehorchenko , I. A. and Vorobyova, A. I.}, year={2022}, month={Apr.}, pages={335-341} }