Theorem 2. The infinitesimal Backlund transformnations Bλ+εBγ-1 of the sine-Gordon equation are permutable if and only if the conserred densities of the equation are in involution in pairs. This theorem reveals an ...Theorem 2. The infinitesimal Backlund transformnations Bλ+εBγ-1 of the sine-Gordon equation are permutable if and only if the conserred densities of the equation are in involution in pairs. This theorem reveals an intrinsie展开更多
文摘Theorem 2. The infinitesimal Backlund transformnations Bλ+εBγ-1 of the sine-Gordon equation are permutable if and only if the conserred densities of the equation are in involution in pairs. This theorem reveals an intrinsie