1. 6-1-00 IMPORTANT: Make sure you are doing both strip mine AND interchange to implement 1 dimensional tiling--if you only do strip mining, it just adds an extra loop overhead, and has no change in the execution order.
2. 5-10-00: GCD Test statement: Please note that the condition in the GCD test is
   if GCD(a1,a2,...an) DOES NOT DIVIDE c, then ....
3. 5-10-00: MIDTERM EXAM IN CLASS ON THURS MAY 18
4. 4-10-00: HW 1 had an error in the code, current version is corrected.
5. 4-11-00: In HW 1, it may be easier to treat the if/begin/end block added as a separate block. I'll accept the CFG either way.