<div>
is this a kind of arithmetic phrase?<br />
or a real regexp?<br />
<br />

</div>


is this a kind of arithmetic phrase?
or a real regexp?



<div>
so the second is b and for the third is ab ???
</div>


so the second is b and for the third is ab ???

<div>
<div class="content wysiwyg-content">
Hello,<br />
<br />
i've got three regular expressions <br />
&nbsp;a*(b U abb)b*b<br />
&nbsp;a*b*b(a U (ab)*)*b*<br />
(a U ab)(a* U ab)*b<br />
<br />
and for each to find the shortest word, w µ[belongs] &nbsp;L(±)<br />
<br />
for the first one i thought that the shortest word is bb &nbsp; &nbsp;and for the 2nd is a* but im not sure for the third one.<br />
<br />
any thoughts on this ? or any corrections ?<br />
<br />
Thanks in advance for any help ! 
</div>
</div>


Hello,

i've got three regular expressions 
 a*(b U abb)b*b
 a*b*b(a U (ab)*)*b*
(a U ab)(a* U ab)*b

and for each to find the shortest word, w µ[belongs]  L(±)

for the first one i thought that the shortest word is bb    and for the 2nd is a* but im not sure for the third one.

any thoughts on this ? or any corrections ?

Thanks in advance for any help ! 

regular expression // shortest word

The Math / Science topic primarily includes discussions of mathematics, physics, statistics and economic analysis, but also biology, chemistry and other sciences.