ON INVARIANCE PROPERTIES OF THE WAVE-EQUATION

[1] Anderson R. L., 1979, LIE BACKLUND TRANSFO

[2] Anderson R L, 1972, REV MEX FIS, V21, P35

[3] GENERALIZATION OF CONCEPT OF INVARIANCE OF DIFFERENTIAL EQUATIONS - RESULTS OF APPLICATIONS TO SOME SCHRODINGER EQUATIONS [J]. PHYSICAL REVIEW LETTERS, 1972, 28 (15) : 988 - &

[4] Bluman G.W., 1974, SIMILARITY METHODS D

[5] ON MAPPING LINEAR PARTIAL-DIFFERENTIAL EQUATIONS TO CONSTANT COEFFICIENT EQUATIONS [J]. SIAM JOURNAL ON APPLIED MATHEMATICS, 1983, 43 (06) : 1259 - 1273

[6] WHEN NON-LINEAR DIFFERENTIAL-EQUATIONS ARE EQUIVALENT TO LINEAR-DIFFERENTIAL EQUATIONS [J]. SIAM JOURNAL ON APPLIED MATHEMATICS, 1982, 42 (05) : 1157 - 1173

[7] Lie S., 1881, ARCH MATH, V6, P328, DOI DOI 10.1016/0167-2789(90)90123-7

[8] Ovsiannikov L.V., 1982, GROUP ANAL DIFFERENT

[1] Anderson R. L., 1979, LIE BACKLUND TRANSFO

[2] Anderson R L, 1972, REV MEX FIS, V21, P35

[3] GENERALIZATION OF CONCEPT OF INVARIANCE OF DIFFERENTIAL EQUATIONS - RESULTS OF APPLICATIONS TO SOME SCHRODINGER EQUATIONS [J]. PHYSICAL REVIEW LETTERS, 1972, 28 (15) : 988 - &

[4] Bluman G.W., 1974, SIMILARITY METHODS D

[5] ON MAPPING LINEAR PARTIAL-DIFFERENTIAL EQUATIONS TO CONSTANT COEFFICIENT EQUATIONS [J]. SIAM JOURNAL ON APPLIED MATHEMATICS, 1983, 43 (06) : 1259 - 1273

[6] WHEN NON-LINEAR DIFFERENTIAL-EQUATIONS ARE EQUIVALENT TO LINEAR-DIFFERENTIAL EQUATIONS [J]. SIAM JOURNAL ON APPLIED MATHEMATICS, 1982, 42 (05) : 1157 - 1173

[7] Lie S., 1881, ARCH MATH, V6, P328, DOI DOI 10.1016/0167-2789(90)90123-7

[8] Ovsiannikov L.V., 1982, GROUP ANAL DIFFERENT