I BOB. XUSUSIY HOSILALI DIFFERENSIAL TENGLAMALAR HAQIDA UMUMIY TUSHUNCHALAR 1.1-§ Xususiy hosilali differensial tenglamalar............................................5 1.2-§ Xususiy hosilali differensial tenglamalar va ularning yechimi to’g’risida tushuncha.............................................................................................18 1.3-§ Ikkinchi tartibli differensial tenglamalarning klassifikatsiyasi va kanonik ko’rinishga keltirish................................................................................