
#1
Apr612, 05:03 PM

P: 467

Hi,
I'm studying computation theory and this symbol that looks like a capital A without the middle bar is used to denote the empty string. What is it called? Thanks. EDIT: Looks like its a capital lambda? 



#2
Apr612, 05:11 PM

Emeritus
Sci Advisor
PF Gold
P: 16,101

Capital lambda ([itex]\Lambda[/itex]) sounds right. I have seen it used to denote the null string.




#3
Apr612, 06:01 PM

P: 367

For future reference:
http://detexify.kirelabs.org/classify.html is a good site where you can draw a symbol and it will identify it for you ( or try to ) 



#4
Apr612, 11:55 PM

P: 467

How do you read this math symbol? 


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