Manifest Background-independence
This is primarily an aesthetic rather than a physical requirement. It is analogous to requiring in differential geometry that equations be written in a form that is independent of the choice of charts and coordinate embeddings. If a background-independent formalism is present, it can lead to simpler and more elegant equations. However there is no physical content in requiring that a theory be manifestly background-independent – for example, the equations of general relativity can be rewritten in local coordinates without affecting the physical implications.
Read more about this topic: Background Independence
Famous quotes containing the word manifest:
“It is manifest therefore that they who have sovereign power, are immediate rulers of the church under Christ, and all others but subordinate to them. If that were not, but kings should command one thing upon pain of death, and priests another upon pain of damnation, it would be impossible that peace and religion should stand together.”
—Thomas Hobbes (1579–1688)