01273nam a2200325 i 450099100097678970753620020507104639.0970307s1976 us ||| | eng b10156318-39ule_instLE00640065ExLDip.to Fisicaita53.1.34510(06)510.34510.35515'.35QA371Hermann, Robert346495The geometry of non-linear differential equations, Bäcklund transformations, and solitons /Robert HermannBrookline, MA :Math Sci Press,1976-772 v. :ill. ;21 cm.Interdisciplinary mathematics ;12-14Bäcklund transformations.b1015631817-02-1727-06-02991000976789707536LE006 510(021) HERPart B12006000018463le006-E0.00-l- 00000.i1018882427-06-02LE006 510(021) HERPart A12006000018487le006-E0.00-l- 00000.i1018883627-06-02Geometry of non-linear differential equations, Bäcklund transformations, and solitons187304UNISALENTOle00601-01-97ma -engus 42