MUNDARIJA. KIRISH.......................................................................................................... 3 IKKINCHI TARTIBLI XUSUSIY HOSILALI DIFFERENSIAL TENGLAMALARNI KANONIK KO’RINISHI 12Asosiy tushunchalar................................................................................. 12Xususiy hosilali differensial tenglamalarning fazoda.......................... 16umumiy holda berilishi.................................................................................. 16 Ikkinchi tartibli xususiy hosilali differensial tenglamalarning kanonik ko‘rinishi va tasnifi 18XULOSA..................................................................................................... 25 IKKITA BUZILISH CHIZIG’IGA EGA BO’LGAN GIPERBOLIK TIPDAGI KVAZICHIZIQLI TENGLAMA UCHUN KOSHI MASALASI 26Eyler integrallari, gipergeometrik funksiyalar va ularning xossalari........... 27Masalaning qo’yilishi............................................................................. 44Koshi masalasi yechimining yagonaligi va mavjudligi.............................. 45Ushbu keltirilganlarni quyidagi teorema ko’rinishida ifodalash mumkin............. 53 Xulosa.......................................................................................................... 53 XOTIMA..................................................................................................... 53 FOYDALANILGAN ADABIYOTLAR......................................................... 54