Encyclopedia of General Topology by K.P. Hart, Jun-iti Nagata, J.E. Vaughan

By K.P. Hart, Jun-iti Nagata, J.E. Vaughan

This e-book is designed for the reader who desires to get a basic view of the terminology of normal Topology with minimum effort and time. The reader, whom we suppose to have just a rudimentary wisdom of set concept, algebra and research, could be capable of finding what they wish in the event that they will competently use the index. even though, this ebook comprises only a few proofs and the reader who desires to learn extra systematically will locate sufficiently many references within the book.

Key features:

• extra phrases from common Topology than the other booklet ever released • brief and informative articles • Authors contain the vast majority of best researchers within the box • vast indexing of terms

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A cover U of the bitopological space (X, τ1 , τ2 ) is defined to be pairwise open if U ⊂ τ1 ∪ τ2 and U contains at least one non-empty member of τ1 and at least one non-empty member of τ2 . If each pairwise open cover of (X, τ1 , τ2 ) has a finite subcover then the space (X, τ1 , τ2 ) is defined to be pairwise compact. Note that (R, U, L) is pairwise compact. Cooke and Reilly [2] considered alternative definitions and characterizations of bitopological compactness. Salbany [13] has provided the most comprehensive early discussion of this topic, based on the stronger definition that (X, τ1 , τ2 ) is pairwise compact if the topological space (X, τ1 ∨ τ2 ) is compact.

Math. 36 (1971), 821–828. Aisling E. McCluskey NUI, Galway, Ireland This Page Intentionally Left Blank B: Basic constructions b-01 Subspaces (hereditary (P)-spaces) b-02 Relative properties b-03 Product spaces b-04 Quotient spaces and decompositions b-05 Adjunction spaces b-06 Hyperspaces b-07 Cleavable (splittable) spaces b-08 Inverse systems and direct systems b-09 Covering properties 60 b-10 Locally (P )-spaces 65 b-11 Rim(P)-spaces b-12 Categorical topology b-13 Special spaces 31 33 37 43 47 49 67 76 74 53 56 This Page Intentionally Left Blank b-1 Subspaces (hereditary (P)-spaces) b-1 31 Subspaces (Hereditary (P)-Spaces) Let X be a given topological space with a topology O (the collection of open subsets) and X a subset of X.

6] H. Fischer, Limesräume, Math. Ann. 137 (1959), 269– 303. [7] M. Fréchet, Sur quelques points du calcul fonctionnel, Rend. Circ. Mat. Palermo 22 (1906), 1–74. [8] W. Gähler, Grundstrukturen der Analysis, AkademieVerlag (1977). [9] H. Hahn, Theorie der reellen Functionen, Berlin (1921). [10] F. Hausdorff, Grundzüge der Mengenlehre, Veit & Comp. (1914). [11] F. Hausdorff, Gestufte Räume, Fund. Math. 25 (1935), 486–506. C. Kent and G. Richardson, Convergence spaces and diagonal conditions, Topology Appl.

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