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A note on pre-interior operators
Published online by Cambridge University Press: 09 April 2009
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Let X be an non-empty set and denote by PX the set algebra consisting of all sunsets of X. An operator i: PX → PX is said to be Pre-interior if (i) iX = X; (ii) i(A∩B) = iA ∩ iB for all A, B in PX.
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- Copyright © Australian Mathematical Society 1965