Give an example to show that if R and S are both n-ary relations, then Pi1,i2,...,im(R

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Give an example to show that if R and S are both n-ary relations, then Pi1,i2,...,im(R − S) may be different from Pi1,i2,...,im(R) − Pi1,i2,...,im(S).

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 03, 2016 01:48 AM

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Show that if R and S are both n-ary relations, then Pi1,i2,...,im(R S) = Pi1,i2,...,im(R) Pi1,i2,...,im(S).
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Give an example to show that if R and S are both n-ary relations, then Pi1,i2,...,im(R

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Discrete Mathematics and Its Applications

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