Re: A different definition of MINUS, Part 3
From: Cimode <cimode_at_hotmail.com>
Date: Thu, 18 Dec 2008 12:31:32 -0800 (PST)
Message-ID: <79364cab-2b74-43a6-935d-5785c533d1a8_at_n33g2000pri.googlegroups.com>
Date: Thu, 18 Dec 2008 12:31:32 -0800 (PST)
Message-ID: <79364cab-2b74-43a6-935d-5785c533d1a8_at_n33g2000pri.googlegroups.com>
Hope this will publish adequately...
R-D= R - (R ∩ D) = R-[(RXD) - (R ∆ D)] = R U R∆D - RXD
R=[{1},{2},{4}]
R-D = [{1},{2},{4}] U [{2}, {3}] - [{1, 1}{1, 2}{1, 4} {3, 1} {3, 2}
{3, 4}]
D= [{1},{3}]
=[{1}{2}{3}{4}] - [{1, 1}{1, 2}{1, 4} {3, 1} {3, 2}{3, 4}]
=[{1}{2}{3}{4}] - [{1}, {3}]
=[{2}{4}]
Received on Thu Dec 18 2008 - 21:31:32 CET