I think I may be over-thinking this as I have had one formal course in QM and an independent study course in QM, but any help is MORE THAN GREATLY APPRECIATED!!!(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

Prove that |-V> = -|V>

2. Relevant equations

He instructs us to begin with |V> + (-|V>) = 0|V> = |0>

3. The attempt at a solution

Let -|V> = |W>

Then

|V> + |W> = 0|V> = |0>

which implies that

|W> = |-V> ?

I'm really confused.

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# Proof for Problem 1.1.1 of Shankars Prin of QM

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