id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
iajs-950	Yousif, Y. Y.; Jassim, N. S.	IJ--Perfect Functions Between Bitopological Spaces	2017	6	.pdf	application/pdf	3189	191	83	If a function f : (X, 1, 2)(Y, S1, S2) is ij--closed such that for each yY, f -1(y) is ij--rigid in X, then f is ij--perfect. If an ij--continuous function f : (X, 1, 2)(Y, S1, S2) is ij--perfect then f is ij--closed and for each yY, f -1(y) is ij--rigid in X. Proof: By theorem (2.11) f an ij--perfect function is ij--closed.	cache/iajs-950.pdf	txt/iajs-950.txt