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The Novikov self-consistency principle, also known as the Novikov self-consistency conjecture, is a principle developed by Russian physicist Igor Dmitriyevich Novikov in the mid-1980s to solve the problem of paradoxes in time travel, which is theoretically permitted in certain solutions of general relativity ( solutions containing what are known as closed timelike curves ).
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Novikov and self-consistency
An alternative is to conjecture that, while time travel is possible, it never leads to paradoxes ; this is the Novikov self-consistency principle.
This could mean that the Novikov self-consistency principle does not actually place any constraints on systems outside of the region of spacetime where time travel is possible, only inside it.
The Novikov self-consistency principle states that a time traveller would not be able to do so.
However, the Novikov self-consistency principle is intended to go beyond just the statement that history must be consistent, making the additional nontrivial assumption that the universe obeys the same local laws of physics in situations involving time travel that it does in regions of spacetime that lack closed timelike curves.
Time loop logic, coined by the roboticist and futurist Hans Moravec, is the name of a hypothetical system of computation that exploits the Novikov self-consistency principle to compute answers much faster than possible with the standard model of computational complexity using Turing machines.
Claims, arguments, or philosophical principles logically equivalent to the Novikov self-consistency principle have been published before Novikov's own publication.
* From wormhole to time machine: Comments on Hawking's Chronology Protection Conjecture, which also addresses the Novikov self-consistency principle
The Novikov self-consistency principle and Kip S. Thorne expresses one view on how backwards time travel could be possible without a danger of paradoxes.
Another resolution, of which the Novikov self-consistency principle can be taken as an example, holds that if one were to travel back in time, the laws of nature ( or other intervening cause ) would simply forbid the traveler from doing anything that could later result in their time travel not occurring.
However, some philosophers and scientists believe that time travel into the past need not be logically impossible provided that there is no possibility of changing the past, as suggested, for example, by the Novikov self-consistency principle.
Novikov formulated the Novikov self-consistency principle in the mid-1980s, an important contribution to the theory of time travel.
# REDIRECT Novikov self-consistency principle # Time loop logic
If CTCs exist, their existence would seem to imply at least the theoretical possibility of time travel backwards in time, raising the spectre of the grandfather paradox, although the Novikov self-consistency principle seems to show that such paradoxes could be avoided.
Or that the time-traveler's personal knowledge of history already includes their future travels to their own experience of the past ( for the Novikov self-consistency principle ).
The Novikov self-consistency principle was anticipated by the tacit understanding of the Time Tunnel scientists that recorded history could not be altered although in episode four (" The Day The Sky Fell In ") the time travelers make it their concern to see to it that young Tony Newman escapes being killed in the Pearl Harbor bombing in order to prevent the adult Tony from ceasing to exist.
In 1990, commenting on the Novikov self-consistency principle ( in relation to sending objects or people through a traversable wormhole into the past, and the time paradoxes that could result ), Polchinski raised a potentially paradoxical situation involving a billiard ball sent through a wormhole which sends it back in time.
Other proposals which allow for backwards time travel but prevent time paradoxes, such as the Novikov self-consistency principle which would ensure the timeline stays consistent, or the idea that a time traveler is taken to a parallel universe while his original timeline remains intact, do not qualify as " chronology protection ".
This Novikov self-consistency principle says that anything a time traveler does in the past must have been part of history all along, so although the time traveler can have a causal influence on events in the past, it is impossible for anything the time traveler does to " change " history.
Novikov and principle
Stated simply, the Novikov consistency principle asserts that if an event exists that would give rise to a paradox, or to any " change " to the past whatsoever, then the probability of that event is zero.
The Novikov consistency principle assumes certain conditions about what sort of time travel is possible.
However, the series does not consistently obey the Novikov principle in episodes featuring time travel, as episodes like Time Squared and Yesterday's Enterprise show history being changed as a result of time travel.
Novikov and also
Along with Radishchev, he liberated Novikov from Schlüsselburg fortress, and also Tadeusz Kościuszko, yet after liberation both were confined to their own estates under police supervision.
In theoretical physics and mathematics, the Wess – Zumino – Witten ( WZW ) model, also called the Wess – Zumino – Novikov – Witten model, is a simple model of conformal field theory whose solutions are realized by affine Kac – Moody algebras.
Novikov and known
In Miami, Florida, a national multi-divisional championship known as The Novikov Invitational is held for anybody within a certain level of expertise, regardless of how they obtained it.
Novikov is known for his work on combinatorial problems in group theory: the word problem for groups, and Burnside's problem.
By reversing this construction, John Milnor and Sergei Novikov ( among many others ) were able to answer questions about the existence and uniqueness of high-dimensional manifolds: this is now known as surgery theory.
The Red Army Choir became known as a propagator of Soviet songs, performing original compositions by composers such as Vasily Solovyov-Sedoy, Anatoli Novikov, Matvey Blanter and Boris Mokrousov.
Novikov and conjecture
play a central role in the surgery classification of the homotopy types of-dimensional manifolds of dimension, and in the formulation of the Novikov conjecture.
This theme is represented, in particular, by considerable progress on the Novikov conjecture and the Baum-Connes conjecture and the development and study of related group-theoretic notions such as topological amenability, asymptotic dimension, uniform embeddability into Hilbert spaces, rapid decay property, and so on ( see, for example ,).
Novikov and is
It was shown by Pyotr Novikov in 1955 that there exists a finitely generated ( in fact, a finitely presented ) group G such that the word problem for G is undecidable.
The Novikov Principle is able to circumvent most commonly-cited temporal paradoxes which are often alleged to exist should time travel be possible ( and are often claimed to make it impossible ).
* Novikov is alluded to by name in the comic Nth Man: The Ultimate Ninja.
* In Season 4 episode 2 of the TV series Eureka The Novikov Self Consistency Principle is explicitly mentioned to justify the many similarities between the " alternative timeline " experienced by the protagonists and their " original timeline ".
Igor Dmitriyevich Novikov () ( born November 10, 1935 in Moscow ) is a Russian ( and former Soviet ) theoretical astrophysicist and cosmologist.
Novikov is married to Eleonora Kotok and has two children, Elena and Dmitry.
It was only in 1992 that Sergei Vasilievich Ivanov was able to prove an analogue of Novikov – Adian theorem: for any m > 1 and an even n ≥ 2 < sup > 48 </ sup >, n divisible by 2 < sup > 9 </ sup >, the group B ( m, n ) is infinite.
Extending this result, Pyotr Novikov and William Boone showed independently in the 1950s that the word problem for groups is not effectively solvable: there is no effective procedure that, given a word in a finitely presented group, will decide whether the element represented by the word is the identity element of the group.
Novikov and developed
With Igor Novikov and Don Page he developed the general relativistic theory of thin accretion disks around black holes, and using this theory he deduced that with a doubling of its mass by such accretion a black hole will be spun up to 0. 998 of the maximum spin allowed by general relativity, but never any farther ; this is probably the maximum black-hole spin allowed in Nature.
Novikov and by
In a 1990 paper by Novikov and several others, Cauchy problem in spacetimes with closed timelike curves, the authors state:
– speech by Novikov
* 1964-A. G. Doroshkevich and Igor Dmitrievich Novikov write an unnoticed paper suggesting microwave searches for the black-body radiation predicted by Gamow, Alpher, and Herman.
The breakthrough in Burnside's problem was achieved by Pyotr Novikov and Sergei Adian in 1968.
It was founded in 1991 by a group of prominent Russian mathematicians that included Vladimir Arnold ( chairman ) and Sergei Novikov.
Wall (); these authors used important preliminary results and particular cases proved by M. Hirsch, W. Massey, S. Novikov and V. Rokhlin, see section 2 of this survey.
The first published recognition of the cosmic microwave background ( CMB ) radiation as a detectable phenomenon appeared in a brief paper by Soviet astrophysicists A. G. Doroshkevich and Igor Novikov, entitled " Mean Density of Radiation in the Metagalaxy and Certain Problems in Relativistic Cosmology ", in the spring of 1964.
Their prediction was rediscovered by Robert Dicke and Yakov Zel ' dovich in the early 1960s with the first published recognition of the CMB radiation as a detectable phenomenon appeared in a brief paper by Soviet astrophysicists A. G. Doroshkevich and Igor Novikov, in the spring of 1964.
This has been obtained by Novikov, Shifman, Vainshtein and Zakharov and can be written as
1978 saw a public statement made by Soviet psychiatrist Yuri Novikov, who was the head of a section of the Serbsky Institute for six years and first secretary of the Association of Soviet Psychiatrists until he left the Soviet Union in June 1977.
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