A Conversation Between Erwin Schrödinger and a Friend

Friend - Hey Schrödinger, what did you do this weekend?
Schrödinger - I came up this with equation.
- Can I hear it?
- Sure, one form of it is:
- That's cool. Did you use a computer?
- Nope.
- A calculator?
- Nope.
- What did you use?
- My brain.
- And it took you a weekend?
- Yep.
- Does it work?
- Yep.
- Cool.
- Yep.