# daf4 - 4 libxz `'ryz,zihxwqic dwihnznl `ean `'ryz ledipe...

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`''ryz ,zihxwqic dwihnznl `ean 4 libxz `''ryz ledipe diiyrz zqcpdl zihxwqic dwihnznl `ean - 4 sc . N * = { 1 , 2 , 3 , . . . } , N = { 0 , 1 , 2 , 3 , . . . } :mipeniq ly zeiaihifpxh ,zeixhniq-ihp` ,zeixhniq , A lr zeiaiqwltx ewcia , A = { 1 , 2 , 3 , 4 , 5 } dveawd dpezp .1 :mi`ad miqgid .( I A = { ( a, a ) : a A } :oeniq) R = I A ∪ { (1 , 2) , (1 , 3) , (2 , 1) } .` . R = { (1 , 1) , (2 , 2) , (3 , 3) , (1 , 2) , (2 , 3) , (1 , 3) , (3 , 1) } .a . R = ( { 1 , 2 , 3 } × { 1 , 2 , 3 } ) ( { 4 , 5 } × { 4 , 5 } ) .b mi`ad miqgid ly zeiaihifpxh ,zeixhniq-ihp` ,zeixhniq , A lr zeiaiqwltx ewcia .2 :( R A × A migipn) . R = { ( a, b ) : a + b = 6 } , A = N .` . R = { ( a, b ) : a = b e` ibef a · b } , A = N .a . R = { ( a, b ) : 3 -a wlgzn a - b } , A = Z .b :( R A × A migipn) A lr iwlg xcq qgi R m`d ewcia .3 . R = { ( a, b ) : b z` wlgn a } , A = N .` . R = { ( a, b ) : b z` wlgn a } , A = Z .a . R = { ( X, Y ) : X Y } , A = P ( N ) .b . R = { ( X, Y ) : X Y } , A

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daf4 - 4 libxz `'ryz,zihxwqic dwihnznl `ean `'ryz ledipe...

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