This ebook is designed for the reader who desires to get a common view of the terminology of basic Topology with minimum effort and time. The reader, whom we think to have just a rudimentary wisdom of set idea, algebra and research, may be capable of finding what they wish in the event that they will adequately use the index. despite the fact that, this ebook includes only a few proofs and the reader who desires to examine extra systematically will locate sufficiently many references within the book.

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• extra phrases from normal Topology than the other e-book ever released

• brief and informative articles

• Authors contain nearly all of best researchers within the box

• large indexing of terms

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**Additional info for Encyclopedia of General Topology**

Fifty one (1950), 571–575. [8] L. F. McAuley, extra approximately open mappings and open difficulties, Topology convention, Auburn collage (1969), 57–70. [9] L. F. McAuley, Monotone mappings – a few milestones, basic Topology and smooth research, McAuley and Rao, eds, educational Press, big apple (1981), 117–143. [10] P. T. McAuley, Fibration, open maps and a suite of examples, Houston J. Math. eleven (1985), 101–108. [11] F. Raymond, The orbit areas of absolutely disconnected teams of transformation on manifolds, Proc. Amer. Math. Soc. 12 (1961), 1–7. [12] S. Smale, A be aware on open mappings, Proc. Amer. Math. Soc. eight (1957), 391–393. [13] S. Stoïlow, Lecons sur les Principes de los angeles Théorie des Fontions Analytiques, Ganthier–Vallars, Paris (1938). [14] S. Stoïlow, Sur les ameliorations maintains et le topologie des fonctions analytiques, Ann. Ecole Norm. Sup. III forty five (1928), 347–381. [15] C. J. Titus and G. S. younger, A Jacobian for inferiority, Michigan Math. J. I (1952), 89–94. [16] J. J. Walsh, mild open and open mappings on manifolds II, Trans. Amer. Math. Soc. 217 (1976), 271–284. [17] J. J. Walsh, Isotoping maps to open mappings, Trans. Amer. Math. Soc. 250 (1979), 121–145. [18] G. T. Whyburn, The mapping of the Betti teams below inside differences, Duke Math. J. four (1938), 1–8. [19] G. T. Whyburn, Analytic Topology, Amer. Math. Soc. , windfall, RI (1942). [20] G. T. Whyburn, Topological research, Princeton, NJ (1958). [21] D. C. Wilson, Open mappings on manifolds and a counterexample to the Whyburn Conjecture, Duke Math. J. forty (1973), 715–716. Louis F. McAuley Binghamton, manhattan, united states c-3 c-3 Closed maps 89 Closed Maps a continual map f : X → Y is named a closed map if for each closed set A ⊆ X, the picture f (A) is closed in Y . The thought of a closed map was once brought by way of W. Hurewicz and through P. S. Alexandroff in 1925 (see [1], and [E]). The sessions of T1 -spaces, general areas, completely common areas and collectionwise common areas are preserved below closed maps. that's, if X has this sort of homes, and f : X → Y is a closed map onto Y , then Y additionally has the corresponding estate. The separation homes of Hausdorff, general and Tychonoff aren't regularly preserved to closed photos. easy examples might be given later. another homes preserved through closed maps are paracompactness (E. Michael, [E, five. 1. 33]), metacompactness onto a Hausdorff variety (Worrell, [E, five. three. 7]), subparacompactness, submetacompactness, σ -spaces, Σ # -spaces, and stratiﬁable areas (M3 -spaces), see, e. g. , the survey article [4]. we are going to point out another houses. The Tychonoff estate is preserved lower than an open-andclosed map, as could be obvious through the next consequence because of Ponomarev: If f : X → Y is an open-and-closed map and u : X → [0, 1] is constant, then the map v : Y → [0, 1], deﬁned by way of v(y) = sup{u(x): x ∈ f −1 (y)}, is constant [E, 1. five. L]. this may even be beneficial in exhibiting that if f : X → Y is an open-and-closed map of a typical house X onto an area Y , then the continual extension βf over the Stone– ˇ Cech compactiﬁcations βX and βY is additionally open-and-closed (A.