Yazar "Jafari, S." seçeneğine göre listele

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    Öğe
    On (?,p)-continuous functions and (?,p)-closed graphs
    (Soc Paranaense Matematica, 2009) Caldas, M.; Ekici, E.; Jafari, S.; Moshokoa, S. P.
    It is the object of this paper to introduce the notions of (delta, p) - continuity and (delta, p)-closed graphs by utilizing the notion of (delta, p)-open sets and investigate the fundamental properties of (delta, p)-continuous functions and also present some properties of functions with (delta, p)-closed graphs.
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    Öğe
    ON A FINER TOPOLOGICAL SPACE THAN ?? AND SOME MAPS
    (Forum Editrice Univ Udinese, 2010) Ekici, E.; Jafari, S.; Latif, R. M.
    In 1943, Fomin [7] introduced the notion of theta-continuity. In 1966, the notions of theta-open subsets, theta-closed subsets and theta-closure were introduced by Velieko [18] for the purpose of studying the important class of H-closed spaces in terms of arbitrary filterbases. He also showed that the collection of theta-open sets in a topological space (X,tau) forms a topology on X denoted by tau(theta) (see also [12]). Dickman and Porter [4], [5], Joseph [11] continued the work of Velieko. Noiri and Jafari [15], Caldas et al. [1] and [2], Steiner [16] and Cao et al [3] have also obtained several new and interesting results related to these sets. In this paper, we will offer a finer topology on X than tau(theta) by utilizing the new notions of omega(theta)-open and omega(theta)-closed sets. We will also discuss some of the fundamental properties of such sets and some related maps.
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    Öğe
    On a finer topological space than τ θ and some maps
    (2010) Ekici, E.; Jafari, S.; Latif, R.M.
    In 1943, Fomin 7 introduced the notion of ?-continuity. In 1966, the notions of ?-open subsets, ?-closed subsets and ?-closure were introduced by Veli?ko 18 for the purpose of studying the important class of H-closed spaces in terms of arbitrary filterbases. He also showed that the collection of ?-open sets in a topological space (X; ?) forms a topology on X denoted by ? ? (see also 12). Dickman and Porter 4, 5, Joseph 11 continued the work of Veli?ko. Noiri and Jafari 15, Caldas et al. 1 and 2, Steiner 16 and Cao et al 3 have also obtained several new and interesting results related to these sets. In this paper, we will off a finer topology on X than ?? by utilizing the new notions of ??-open and ??-closed sets. We will also discuss some of the fundamental properties of such sets and some related maps.
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    Öğe
    On Almost Contra-Continuous Multifunctions
    (Maik Nauka/Interperiodica/Springer, 2009) Ekici, E.; Jafari, S.; Popa, V.
    In this paper, we introduce and study the notion of almost contra-continuous multifunctions. Characterizations and properties of almost contra-continuous multifunctions are discussed.
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    ON FUZZY UPPER AND LOWER CONTRA-CONTINUOUS MULTIFUNCTIONS
    (Univ Sistan & Baluchestan, 2011) Alimohammady, M.; Ekici, E.; Jafari, S.; Roohi, M.
    This paper is devoted to the concepts of fuzzy upper and fuzzy lower contra-continuous multifunctions and also some characterizations of them are considered.
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    Öğe
    On fuzzy upper and lower contra-continuous multifunctions
    (2011) Alimohammady, M.; Ekici, E.; Jafari, S.; Roohi, M.
    This paper is devoted to the concepts of fuzzy upper and fuzzy lower contra-continuous multifunctions and also some characterizations of them are considered.
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    Öğe
    On weakly BR-open functions and their characterizations in topological spaces
    (Warsaw University, 2011) Caldas, M.; Ekici, E.; Jafari, S.; Latif, R.M.
    In this paper, we introduce and study a new class of functions by using the notions of b-?-open sets and b-?-closure operator called weakly BR-open functions. The connections between this function and the other existing topological functions are studied.
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    ON WEAKLY BR-OPEN FUNCTIONS AND THEIR CHARACTERIZATIONS IN TOPOLOGICAL SPACES
    (De Gruyter Open Ltd, 2011) Caldas, M.; Ekici, E.; Jafari, S.; Latif, R. M.
    In this paper, we introduce and study a new class of functions by using the notions of b-theta-open sets and b-theta-closure operator called weakly BR-open functions. The connections between this function and the other existing topological functions are studied.