April 24, 2007

**Printed Name:**________________________________________

"On my honor, as an Aggie, I have neither given nor received unauthorized aid on this academic work. In particular, I certify that I have not received or given any assistance that is contrary to the letter or the spirit of the collaboration guidelines for this assignment."

**Signature:**___________________________________________

- (2 pts) What is the difference between
an equivalence relation and a partial order?

- (1 pt)
*True or False:*The partial order represented by the Hasse diagram below is a lattice.

- (2 pt) Consider the regular grammar G = (V,T,S,P), where

V = {S,A,0,1}

T = {0,1}

P consists of the rules S -> 0S | 1A | 1 and A -> 1A | 1.

Give a derivation for the string 011.