References
- S. K. Bhakat and P. Das, On the definition of a fuzzy subgroup, Fuzzy Sets and Systems 51 (1992), no. 2, 235-241. https://doi.org/10.1016/0165-0114(92)90196-B
-
S. K. Bhakat and P. Das, (
${\in}, {\in} {\vee}q$ )-fuzzy subgroup, Fuzzy Sets and Systems 80 (1996), no. 3, 359-368. https://doi.org/10.1016/0165-0114(95)00157-3 - A. Borumand Saeid, R. A. Borzoei, and M. M. Zahedi, (Weak) implicative hyper K-ideals, Bull. Korean Math. Soc. 40 (2003), no. 1, 123-137. https://doi.org/10.4134/BKMS.2003.40.1.123
- R. A. Borzooei, Hyper BCK and K-algebras, Ph. D. thesis, Shahid Bahonar University of Kerman, 2000.
- R. A. Borzooei, A. Hasankhani, M. M. Zahedi, and Y. B. Jun, On hyper K-algebras, Math. Japon. 52 (2000), no. 1, 113-121.
- Y. B. Jun, On fuzzy hyper K-subalgebras of hyper K-algebras, Sci. Math. 3 (2000), no. 1, 67-75
-
Y. B. Jun, On (
${\alpha}, {\beta}$ )-fuzzy subalgebras of BCK/BCI-algebras, Bull. Korean Math. Soc. 42 (2005), no. 4, 703-711. https://doi.org/10.4134/BKMS.2005.42.4.703 -
Y. B. Jun, Fuzzy subalgebras of type (
${\alpha}, {\beta}$ ) in BCK/BCI-algebras, Kyungpook Math. J. 47 (2007), no. 3, 403-410. - Y. B. Jun and W. H. Shim, Fuzzy positive implicative hyper K-ideals in hyper K- algebras, Honam Math. J. 25 (2003), no. 1, 43-52.
- Y. B. Jun and W. H. Shim, Fuzzy hyper K-ideals of hyper K-algebras, J. Fuzzy Math. 12 (2004), no. 4, 861-871.
- Y. B. Jun and S. Z. Song, Generalized fuzzy interior ideals in semigroups, Inform. Sci. 176 (2006), no. 20, 3079-3093. https://doi.org/10.1016/j.ins.2005.09.002
- Y. B. Jun, M. M. Zahedi, X. L. Xin, and R. A. Borzoei, On hyper BCK-algebras, Ital. J. Pure Appl. Math. No. 8 (2000), 127-136.
- F. Marty, Sur une generalization de la notion de groupe, 8th Congress Math. Scandinaves, Stockholm (1934), 45-49.
- V. Murali, Fuzzy points of equivalent fuzzy subsets, Inform. Sci. 158 (2004), 277-288. https://doi.org/10.1016/j.ins.2003.07.008
- P. M. Pu and Y. M. Liu, Fuzzy topology. I. Neighborhood structure of a fuzzy point and Moore-Smith convergence, J. Math. Anal. Appl. 76 (1980), no. 2, 571-599. https://doi.org/10.1016/0022-247X(80)90048-7
- M. S. Ying, A new approach for fuzzy topology. I, Fuzzy Sets and Systems 39 (1991), no. 3, 303-321. https://doi.org/10.1016/0165-0114(91)90100-5
- M. S. Ying, On standard models of fuzzy modal logics, Fuzzy Sets and Systems 26 (1988), no. 3, 357-363. https://doi.org/10.1016/0165-0114(88)90128-5