kaisar-rashie

[kaisar-rashie]

[kaisar-rashie]

In math books, the

Theorem:

Proof:

format should be replaced with

Theorem:

Proof idea:

Proof:

The proof idea is a short summary of the key idea behind the proof. Given the proof idea, you might be able to figure out the full proof.

[kaisar-rashie]

the proof is left as an exercise for the reader.