Miguel Caldas Cueva » 2001-2002

061. On The Class Of Semi-$\theta$-Open Sets In Topological Spaces

caldas — Wed, 17 Feb 2010 23:08:27 +0000

Math Journal: East West Journal Of Mathematics, Khon Kaen University, Thailand, V. 4, N. 2, P. 137-147, 2002
Authors: Caldas M., Jafari, S. and Noiri, T.

060. On Fuzzy Approximately Semiopen Mappings

caldas — Wed, 17 Feb 2010 23:07:56 +0000

Math. Journal: Journal of Tripura Mathematical Society, India, v. 4, p. 71-75, 2002.
Authors: Caldas, M. and Saraf, R. K.

059. On $\delta$-D Sets Associated Weak Separation Axioms

caldas — Wed, 17 Feb 2010 23:07:34 +0000

Math. Journal: Bull Malaysiam Math Sci Soc, Malaysia, v. 25, p. 1-13, 2002.
Authors: Caldas, M. and Jafari, S.

058. \Lambda_{S}$-Closure Operator And The Associated Topology $\tau^{\Lambda_{s}$

caldas — Wed, 17 Feb 2010 23:07:12 +0000

Math. Journal: Journal of the Indian Mathematical Society, ISSN 0019-5839 India, v. 69, p. 71-79, 2002.
Authors: Caldas, M., and Dontchev, J.

057. Weakly $\theta$-Closed Function Between Fuzzy Topological Spaces

caldas — Wed, 17 Feb 2010 23:06:45 +0000

Math. Journal: Matematicki Vesnik Beograd, Servia and Montenegro, v. 54, p. 13-20, 2002.
Authors: Caldas M., Navalagi G. and Saraf, R. K.

056. On fuzzy weakly semiopen functions

caldas — Wed, 17 Feb 2010 23:06:14 +0000

Math Journal: Proyecciones- Revista de Matemática, Chile, v. 21, p. 51-63, 2002
Authors: Caldas M., Navalagi, G. and Saraf, R. K.

055. Fa $\alpha$-Irresolute Mappings

caldas — Wed, 17 Feb 2010 23:05:43 +0000

Math. Journal: Bull Malaysiam Math Sci Soc. Malaysia, 24(2001), p. 193-199.
Authors: Caldas M., Saraf,R.K., and Mishra, S.

054. A separation axiom between Pre-T0 and Pre-T1

caldas — Wed, 17 Feb 2010 23:05:08 +0000

Math. Journal: East West Journal Of Mathematics,Thailand. 3 (2001), 171-177.
Authors: Caldas M.

053. A remark on weakly semiclosed functions

caldas — Wed, 17 Feb 2010 23:03:44 +0000

Math. Journal: J. Inst. Math. Comput. Sci., Math. Ser. Calcutta, India. 14 (2001), 107-110.
Authors: Caldas M., and Navalagi, G.

052. A note on Hardly open functions

caldas — Wed, 17 Feb 2010 23:03:11 +0000

Math. Journal: Comptes Rendus de L’Academie Bulgare de Sciences, Bulgaria. 54, (2001), 5-8.
Authors: Caldas M.

051. An answer to question of David A. Rose

caldas — Wed, 17 Feb 2010 23:02:19 +0000

Math. Journal: Pro-Math. Peru. 15 (2001), 93-96.
Authors: Caldas M.

050. On preserving fuzzy sg-closed sets

caldas — Wed, 17 Feb 2010 23:01:56 +0000

Math. Journal: Proyecciones- Revista de Matemática, Chile. 20 (2001), 127-138.
Authors: Caldas M., and Saraf, R.K.

049. Some properties of Contra $\beta$-continuous functions

caldas — Wed, 17 Feb 2010 23:01:11 +0000

Math. Journal: Mem. Fac. Sci. Kochi Univ. (Math) Japan. ISSN 0389-0252. 22 (2001) 19-28.
Authors: Caldas M., and Jafari, S.

Abstract
In [5], Dontchev introduced and investigated a new notion of continuity called contra continuity. Recently, Dotchev and Noiri [7] introduced a new generalization of contra-continuity called contra-semi-continuity. The aim of this paper is to present and study a new class of functions called contra-$\betha$-continuity.

048. A new characterization for a topological space to be semi-T_1/2

caldas — Wed, 17 Feb 2010 23:00:29 +0000

Math. Journal: Comptes Rendus de L’Academie Bulgare de Sciences, Bulgaria. 54(2001), 5-6.
Authors: Caldas, M.

Abstract
A topological space $(X,\tau)$ is semi-$T_{1/2}$ if and only if, every subset of X is $\tau$-semi-closed.

047. More on generalized homeomorphisms in topological spaces

caldas — Wed, 17 Feb 2010 22:59:32 +0000

Math. Journal: Divulgaciones Matemáticas, Venezuela. 9 (2001), 55-63.
Authors: Caldas M.

Abstract
The aim of this paper is to continue the study of generalized homeomorphisms, for itwe define the concept of three new classes of maps namely generalized $\Lambda_s$-open , generalized $\Lambda_{s}^{c}$-homeomorphisms and $\Lambda_{s}^{I}$-homeomorphisms by using g.$\Lambda_s$-sets, which are generalizations of semi-open maps and generalizations of homeomorphisms and we investigate some properties of their maps from the quotient space to other spaces.