To prove a set A is a subset of a set B, we must: O Show for all x, if x is in A then x is in B O There are elements of B that are not in A O Draw a picture O Show A intersect B is nonempty

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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To prove a set A is a subset of a set B, we must:
O Show for all x, if x is in A then x is in B
O There are elements of B that are not in A
O Draw a picture
O Show A intersect B is nonempty
Transcribed Image Text:To prove a set A is a subset of a set B, we must: O Show for all x, if x is in A then x is in B O There are elements of B that are not in A O Draw a picture O Show A intersect B is nonempty
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