Test 3

Today we had test 3 but I did not do so well in it (I dont know, maybe I did). I have a bad fever and a flu since 5 days and its been bugging me a lot... I cant even study properly... I thought of going to the hospital but the fear of having to take a blood test forced me to take the test no matter what; because last time I took a blood test, the syringe needle broke in my arm and getting that thing out was the most painful experience in my life and since then, has become my greatest fear...

About the test, the first question about the DFSA seemed familiar to Q4 from the third assignment. I think I got all the state declarations right and I think the way to tackle part b of the first question was to count the odd/even number of 1's and their sums and match them to the declaration that suits it.

I think I bombed the second question, I thought about it on my way home and I think I got the wrong answer for it. I proved that if there is a regex for R1 and R2 then there is a subset that can be denoted for L(R1 + R2) and since R1+R2 belongs to R, then the subset (0,1,epsilon) exists...

The third question was easy but I think I used the wrong technique... I made a DFSA that represents L2 and by using minimisation techniques, I got a regular expression that takes from state epsilon to a final accepting state and that regular expression was eqivalent to the L( ... ) expression. I wanted to make a formal proof but my head hurt too much and I couldnt concentrate anymore.

I hope I will get better soon because my finals start next week and I need to study for them.