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On equinormal quasi-metrics
Published online by Cambridge University Press: 20 January 2009
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Throughout this paper all spaces are T1 and N will denote the set of all positive integer numbers.
A quasi-metric on a set X is a non-negative real-valued function d on X × X such that, for all x, y, z ∈ X, (i) d(x, y) = 0 if, and only if, x = ysemicolon (ii) d(x, y)≦d(x, z) + d(z, y).
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- Copyright © Edinburgh Mathematical Society 1989
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