xususiy hosilali differentsial tenglamalar va ularning klassifikatsiyasi
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1662925911.doc n n e d x x x x ì î = ) ,..., , ( 2 1 d n e n x x x ,..., , 2 1 x n ) ,..., , ( 2 1 n a a a a = n n a a a a + + + = ... 2 1 ) ,..., , ( ) ( 2 1 n x x x u x u = d x î n a a a a + + + = ... 2 1 n n x x x u u d d d u d n n a a a a a a a a ¶ ¶ ¶ ¶ = = , , , , , …
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