# no-ghost theorem

> English word · Proper noun

## Definitions
1. Goddard-Thorn theorem

## Etymology
A play on no-go theorem, incorporating ghost; so called because, in the original statement of the theorem, there are no vectors of negative norm for r ≠ 0.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/no-ghost-theorem