MUNDARIJA.KIRISH.......................................................................................................... 3IKKINCHI TARTIBLI XUSUSIY HOSILALI DIFFERENSIAL TENGLAMALARNI KANONIK KO’RINISHI 12Asosiy tushunchalar................................................................................. 12Xususiy hosilali differensial tenglamalarning fazoda.......................... 16umumiy holda berilishi.................................................................................. 16Ikkinchi tartibli xususiy hosilali differensial tenglamalarning kanonik ko‘rinishi va tasnifi 18XULOSA..................................................................................................... 25IKKITA 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............. 53Xulosa.......................................................................................................... 53XOTIMA..................................................................................................... 53FOYDALANILGAN ADABIYOTLAR......................................................... 54