000 00537nam a2200169Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a510.7
_bOs82
100 _aBirkeland Bent
245 _aLocal cauchy problem in R squire at a point where two characteristic curves have a common tangent
260 _aOslo
_bUniversity
_c1977
440 _aOslo University.Institute of mathematics preprint series : 1977, 1
650 _aMathematics
700 _aPersson Jan
_4Auth.
942 _cBK
999 _c79999
_d79999