Geodesic
Introduction to the theory of $(\nu_1,\dots,\nu_{r-1})$-transforms
Sbornik. Mathematics, Tome 60 (1988) no. 1, pp. 163-176 Cet article a éte moissonné depuis la source Math-Net.Ru

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The transforms \begin{gather*} \varphi_\nu(x)=\int_0^\infty\dotsi\int_0^\infty f\Bigl(x\prod t_i\Bigr)e^{-\sum{t_i^r}}\prod t _i^{r{\nu_i}+r-1}\,dt_i, \\ f(x)=\biggl(\frac r{2\pi i}\biggr)^{r-1}\int_{-\infty}^{(0+)}\dotsi\int_{-\infty}^{(0+)}\varphi_\nu\Bigl(x\prod t_i^{-\frac1r}\Bigr)e^{\sum{t_i}}\prod t_i^{{-\nu_i}-1}\,dt_i \end{gather*} are introduced for an integer $r\geqslant2$ and a given vector $\nu=(\nu_1,\dots,\nu_{r-1})$. Their duality is substantiated, applications of the differentiation operations are studied, and other properties of $\nu$-transforms are established. A number of examples are given to illustrate the method of $\nu$-transforms for solving some classes of differential equations and boundary value problems for partial differential equations. Bibliography: 9 titles. 
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M. I. Klyuchantsev. Introduction to the theory of $(\nu_1,\dots,\nu_{r-1})$-transforms. Sbornik. Mathematics, Tome 60 (1988) no. 1, pp. 163-176. http://geodesic.mathdoc.fr/item/SM_1988_60_1_a9/

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