Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Refer to attached images and provide correct solutions!
Transcribed Image Text:Assume that R, S, and T are regular
expressions and ε is the empty
string and is the empty set.
Select all the identities of that are
correct:
ω
Q
0 = 0
ε
*
=
Q
*
= ε
*
= ε
*
(R*)* = R
*
☐ R. R+ = R*
ε + R.R* = R*
| (R.S)* .R = R. (R.S)*
(R+S)* = (R". S*')"
Transcribed Image Text:The regular expression for the set
{b, ba, baa, baaa, ...} is as R=ba*.
○ True
○ False
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