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Let X:= (a, b, c, d, e). Tx = (0, X,{a}, {b}, {d}, {a, b}, {a, d}{b, d}, {a, b, d }} be a
Let X:= (a, b, c, d, e). Tx = (0, X,{a}, {b}, {d}, {a, b}, {a, d}{b, d}, {a, b, d }} be a topology on X. Let A = {b, d, e}cX. Then ExtA = Select one: none O (a) O (a,c)
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Database System Concepts
Authors: Henry F. Korth, S. Sudarshan
4th Edition
978-0073523323, 0-07-255481-9, 73523321, 978-0072554816
