What does this equal to???

Question

From Rosen's Discrete Mathematics and Its Applications, 3ed, chapter 6 p. 390:

There seems to be something missing at the place underlined in red. Could this be ∅ (null symbol)?

1

it sure looks that way – J. W. Tanner Feb 06 '20 at 03:50

score 3 · Accepted Answer · answered Feb 06 '20 at 03:51

3

Yes, it has to be $\varnothing$, as the text above explicitly states that the $A_i$ are pairwise disjoint. $\varnothing$ is a special character and may have failed to render in the final document, or it may be a slip of the mind.

answered Feb 06 '20 at 03:51

Parcly Taxel

103,344

Thank you! I was hesitant and need confirmations. – J. Doe Feb 06 '20 at 04:03

What does this equal to???

1 Answers1