Class Notes (835,007)
Canada (508,866)
CPSC 313 (6)
Lecture

Proof of Non-Regularity

1 Page
126 Views
Unlock Document

Department
Computer Science
Course
CPSC 313
Professor
Philipp Woelfel
Semester
Winter

Description
January 27th, 2012 Practice Question Proof. L = fa b j n 6= lg is not regular. Let m be given. Choose w such that jwj ▯ m, e:g: a b t t where t 6= t and t ▯ m. Let xyz = w, such that jxyj ▯ m and jyj ▯ 1 ) y = a 1 ▯ k ▯ m i We want to show: Choose an i ▯ 0 such that xy z 2 = L. a t▯k+i▯kb = a t+(i▯1)b . (t + (i ▯ 1)k = t t ▯t , k = i ▯ 1 t ▯t , i = k + 1. 0 Choose t ;t such that 0 t ▯ t = m!, so t = m t = m + m! So, we look at the top again: m m+m!
More Less

Related notes for CPSC 313

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit