Proof of the theorem
•
The theorem holds for group A and B, since they have only n
marbles. All the marbles are of the same color, since they share
a
n
.
a
1
, a
2
,
・・・
, a
n
, a
n+1
group A
group B
l
Base case n=1 is easy
l
The induction step
What is wrong?