A vague soft set is a combination of a vague set and a soft set. In this paper, four kinds of cut sets on vague soft sets are introduced, which are generations of cut sets on fuzzy sets and have the same properties as that of fuzzy sets. The relations among these kinds of cut sets are also discussed. Then, the definitions of order nested sets and inverse order nested sets are given. Furthermore, based on them, the decomposition theorems and representation theorems of vague soft sets are established.
ZadehL.A., Fuzzy sets, Information and Control8(3) (1965), 338–353.
2.
DuboisD., PradeH., Fuzzy Sets and Systems: Theory and Applications, Academic Press, New York, 1980.
3.
YuanX.H., LiH.X. and SunK.B., Three new cut sets of fuzzy sets and new theories of fuzzy sets, Computers and Mathematics with Applications57 (2009), 691–701.
4.
YuanX.H., LiH.X. and LeeE.S., The new cut sets, decomposition theorems and representation theorems on intuitionistic fuzzy sets and interval valued fuzzy sets, Science China (Information Science)54(1) (2011), 91–110.
5.
WangF.X., ZhangC.Z. and XiaZ.Q., Equivalence of the new cut sets-based on decomposition theorems and representation theorems on intuitionistic fuzzy sets and interval valued fuzzy sets, Mathematical and Computer Modelling57 (2013), 1364–1370.
6.
LiX.S., YuanX.H. and LeeE.S., The three-dimensional fuzzy sets and their cut sets, Computers and Mathematics with Applications58 (2009), 1349–1359.
7.
AtanassovK., Intuitionistic fuzzy sets, Fuzzy Sets and Systems20(1) (1986), 87–96.
8.
GauW.L. and BuehrerD.J., Vague sets, IEEE Transactions on Systems, Man and Cybernetics23(2) (1993), 610–614.
9.
AtanassovK., Operators over interval valued intuitionistic fuzzy sets, Fuzzy Sets and Systems64(2) (1994), 159–174.
10.
MolodtsovD., Soft set theory-First results, Computers and Mathematics with Applications37(4- 5) (1999), 19–31.
11.
MajiP.K., BiswasR. and RoyA.R., Fuzzy soft sets, Journal of Fuzzy Mathematics9(3) (2001), 589–602.
12.
XuW., MaJ., WangS. and HaoG., Vague soft sets and their properties, Computers and Mathematics with Applications59(2) (2010), 787–794.
13.
BustinceH. and BurilloP., Vague sets are intuitionistic fuzzy sets, Fuzzy Sets and Systems79(3) (1996), 403–405.
14.
MajiP.K., BiswasR. and RoyA.R., Intuitionistic fuzzy soft sets, The Journal of Fuzzy Mathematics9(3) (2001), 677–692.
15.
MajiP.K., BiswasR. and RoyA.R., On intuitionistic fuzzy soft sets, The Journal of Fuzzy Mathematics12(3) (2004), 669–683.
16.
GunduzC. and BayramovS., Intuitionistic fuzzy soft modules, Computers and Mathematics with Applications62(6) (2011), 2480–2486.
17.
JiangY., TangY., ChenQ., LiuH. and TangJ.C., Interval-valued intuitionistic fuzzy soft sets and their properties, Computers and Mathematics with Applications60(3) (2010), 906–918.
18.
JiangY., TangY. and ChenQ., An adjustable approach to intuitionistic fuzzy soft sets based decision making, Applied Mathematical Modelling35(2) (2011), 824–836.
19.
ZhangZ., A rough set approach to intuitionistic fuzzy soft set based decision making, Applied Mathematical Modelling36(10) (2012), 4605–4633.
20.
WangC. and QuA., Entropy, similarity measure and distance measure of vague soft sets and their relations, Information Sciences244 (2013), 92–106.