different between extropy vs negentropy

English

Etymology

First coined to serve as an antonym of entropy, substituting its en- element (representing the prepositional prefix ?? (en), en, “in” in its Ancient Greek etymon ???????? (entropía), entropia, “a turning towards”) with ex- (representing the Ancient Greek ?? (ex), ex, “out of”, “from”); because ?? (ex) takes the form ?? (ek) when prefixed to an element beginning with ? (t), the analogical spelling is ectropy (or, alternatively, ektropy), as if after the Ancient Greek *???????? (ektropía, “a turning out of”).

Noun

extropy

1. negentropy.

Derived terms

• extropian

Further reading

• Extropy on Wikipedia.Wikipedia

English

Etymology

A blend of negative +? entropy, coined by the French physicist Léon Brillouin (1889–1969). The term negative entropy was introduced by the Austrian physicist Erwin Schrödinger (1887–1961) in his book What is Life? (1944, based on lectures delivered in February 1943).

Pronunciation

• (Received Pronunciation) IPA^(key): /?n????nt??pi/
• (General American) IPA^(key): /?n????nt??pi/
• Hyphenation: neg?en?tro?py

Noun

negentropy (countable and uncountable, plural negentropies)

1. (thermodynamics) The difference between the entropy of a system and the maximum possible entropy of the same system. [from 1950s]
2. (information theory) The difference between the entropy of a probability distribution and the maximum possible entropy of the same probability distribution.

Synonyms

• centropy
• disentropy
• entaxy
• extropy

Antonyms

• entropy

Derived terms

• negentropic

References

Further reading

• negentropy on Wikipedia.Wikipedia
• maximum entropy probability distribution on Wikipedia.Wikipedia