Geodesic
On the Сauchy problem for the equation $u_{tt}-u_{xx}-\sum_{i,j=1}^{n-1}a_{ij}(x-t)u_{y_iy_j}=0$
Sbornik. Mathematics, Tome 31 (1977) no. 3, pp. 347-363 Cet article a éte moissonné depuis la source Math-Net.Ru

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     title = {On the {{\CYRS}auchy} problem for the equation $u_{tt}-u_{xx}-\sum_{i,j=1}^{n-1}a_{ij}(x-t)u_{y_iy_j}=0$},
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N. Kh. Ibragimov; E. V. Mamontov. On the Сauchy problem for the equation $u_{tt}-u_{xx}-\sum_{i,j=1}^{n-1}a_{ij}(x-t)u_{y_iy_j}=0$. Sbornik. Mathematics, Tome 31 (1977) no. 3, pp. 347-363. http://geodesic.mathdoc.fr/item/SM_1977_31_3_a3/

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