# Symmetry And Conservation

## Symmetry

If HERE is SOMETHING, THERE is SOMETHING' too.
If THERE is SOMETHING', HERE is SOMETHING too.

## Conservation

The following mapping preserves SOMETHING-NESS.

f: HERE -> THERE
f(SOMETHING) = SOMETHING'

--- HERE ----    --- THERE ----
|           |    |            |
| SOMETHING | -> | SOMETHING' |
|           |    |            |
-------------    --------------