@article{Bushev_1998, title={Isometry of functional spaces with different number of variables}, volume={50}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/4852}, abstractNote={We construct spaces of real functions of <em class="a-plus-plus">n + k</em> variables that are isometric to spaces of real functions given on an <em class="a-plus-plus">n</em&gt;-dimensional Euclidean space. We present certain properties and examples of delta-like kernels used for the construction of isometric spaces of functions with different number of variables. We prove certain assertions that enable one to construct delta-like kernels with many variables by using delta-like kernels with smaller number of variables.}, number={8}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Bushev, D. M.}, year={1998}, month={Aug.}, pages={1027–1045} }