Fall 1999/ Spring 2000 Discrete Postage stamp to show that:
NOT(Magic(Postage Stamp Induction))
The basic idea: Write down the multiples of each postage value in two
adjacent columns. There will be a place where there is only a 1 cent
difference between the columns, in favor of the 1st column. There will
be a 2nd place where there is a one cent difference between the columns,
in favor of the 2nd column.
- Shopping with 7/11 cent postage
slide #1
showing that the basis is less than the 65 cents. Its 62 cents.
- Shopping with 7/11 cent postage
slide #2
continuing the effort to show why the two cases and postage
stamp proofs are NOT MAGIC.
- Shopping with 7/11 cent postage
slide #3
starts the proof, finally. The BASIC step is on this page.
- Shopping with 7/11 cent postage
slide #4
contains the INDUCTIVE STEP of the proof. Note the a, b, c
structure and the two different cases, b >= 5 and b < 5.