CSCI 470 Spring 2015
Languages and Machines
Archived Class
Charles Cusack
Computer Science
Hope College
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Homework 5

General Comments

  • Problems are taken from the textbook unless otherwise noted.
  • For full credit, provide context for each problem, show all calculations, and explain your work/answers.
  • Numbers and/or algebra by themselves are not enough.
  • You will lose a significant amount of credit if you do not show enough work/context for your answers.
  • Precision is very important. You cannot skip steps, make guesses, or use flawed logic. Any of these things can lead to incorrect answers.
  • Homework assignments must be very neatly written or typeset (e.g. using Word or OpenOffice).
  • You must indicate any assistance you had on an assignment as specified on the Policies page.

Details

  1. 1.21b (Show intermediate steps of the procedure. Also, first rip out 1, then 2, and then 3.)
  2. 1.29b (remove this or 1.46c)
  3. 1.30
  4. 1.32 (Use a DFA)
  5. 1.37* (remove in future)
  6. 1.46c (remove this or 1.29b)
  7. 1.49
  8. 1.55e (consider removing in future)
  9. 1.55g (consider removing in future)
  10. 1.61* (remove in future)
  11. 1.62* (make required in future)
*You actually only need to do one of 1.37, 1.61, and 1.62.
Also the 1.55 problems can be a little tricky. Read the problem very carefully and make sure you fully understand what the pumping lemma and the problem are really saying.