Speakur

Word Pronunciation & Dictionary

null infinity

Word Rarity Rare

Frequency: Zipf frequency 3.47 in modern English

Syllables
nul-l in-fin-i-ty
IPA
18
Scrabble Score
12
Letters
5
Syllables
7
Unique Chars

Meaning

noun

In a closed space-time, especially for an Einstein cylinder, null infinity for a given point is the limit of convergence of the light cone most distant from the given point. That is, it is the limit of a set of points that each have a time-like separation from every point that has a space-like separation from the given point.

Etymology

From the physics concept of "at infinity" or "far", where fields are small, and the math concept of null set. Ironically, a null infinity may be neither far nor a null set.

Inflected Forms

null infinities (plural)

Questions

What does null infinity mean?
In a closed space-time, especially for an Einstein cylinder, null infinity for a given point is the limit of convergence of the light cone most distant from the given point. That is, it is the limit of a set of points that each have a time-like separation from every point that has a space-like separation from the given point.
Where does null infinity come from?
From the physics concept of "at infinity" or "far", where fields are small, and the math concept of null set. Ironically, a null infinity may be neither far nor a null set.

How to pronounce null infinity

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