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What (who) is M-theory - definition
M-theory
![hyperbolic disks]], each one representing the state of the universe at a given time. One can study theories of [[quantum gravity]] such as M-theory in the resulting [[spacetime]].](https://commons.wikimedia.org/wiki/Special:FilePath/AdS3.svg?width=200 "hyperbolic disks]], each one representing the state of the universe at a given time. One can study theories of [[quantum gravity]] such as M-theory in the resulting [[spacetime]].")
![compactification]]: At large distances, a two-dimensional surface with one circular dimension looks one-dimensional.](https://commons.wikimedia.org/wiki/Special:FilePath/Compactification example.svg?width=200 "compactification]]: At large distances, a two-dimensional surface with one circular dimension looks one-dimensional.")
![In the 1980s, [[Edward Witten]] contributed to the understanding of [[supergravity]] theories. In 1995, he introduced M-theory, sparking the [[second superstring revolution]].](https://commons.wikimedia.org/wiki/Special:FilePath/Edward Witten.jpg?width=200 "In the 1980s, [[Edward Witten]] contributed to the understanding of [[supergravity]] theories. In 1995, he introduced M-theory, sparking the [[second superstring revolution]].")
![superstring theories]], and eleven-dimensional [[supergravity]]. The shaded region represents a family of different physical scenarios that are possible in M-theory. In certain limiting cases corresponding to the cusps, it is natural to describe the physics using one of the six theories labeled there.](https://commons.wikimedia.org/wiki/Special:FilePath/Limits of M-theory.svg?width=200 "superstring theories]], and eleven-dimensional [[supergravity]]. The shaded region represents a family of different physical scenarios that are possible in M-theory. In certain limiting cases corresponding to the cusps, it is natural to describe the physics using one of the six theories labeled there.")
![A diagram of string theory dualities. Yellow arrows indicate [[S-duality]]. Blue arrows indicate [[T-duality]]. These dualities may be combined to obtain equivalences of any of the five theories with M-theory.<ref>Becker, Becker, and Schwarz 2007, pp. 339–347</ref>](https://commons.wikimedia.org/wiki/Special:FilePath/StringTheoryDualities.svg?width=200 "A diagram of string theory dualities. Yellow arrows indicate [[S-duality]]. Blue arrows indicate [[T-duality]]. These dualities may be combined to obtain equivalences of any of the five theories with M-theory.<ref>Becker, Becker, and Schwarz 2007, pp. 339–347</ref>")
FRAMEWORK OF SUPERSTRING THEORY INCORPORATING ALL FIVE SUPERSTRING THEORIES
Mtheory; M Theory; M theory; M-Theory; Mysterious duality; M-theories; ME8; BFSS conjecture; 11-dimensional spacetime
M-theory is a theory in physics that unifies all consistent versions of superstring theory. Edward Witten first conjectured the existence of such a theory at a string theory conference at the University of Southern California in 1995.
Introduction to M-theory
NON-TECHNICAL INTRODUCTION TO M-THEORY, THE LEADING CONTENDER FOR A UNIVERSAL "THEORY OF EVERYTHING" THAT UNIFIES GRAVITY WITH OTHER FORCES SUCH AS ELECTROMAGNETISM.
M-theory Simplified; M-theory simplified; M-theory (simplified explanation); M-theory (simplified); Introduction to m-theory; E8 X E8; E8 x E8; Non-technical introduction to M-theory; Bulk space
In non-technical terms, M-theory presents an idea about the basic substance of the universe. As of 2022, science has produced no experimental evidence to support the concept that M-theory is a description of the real world.
Theory (mathematical logic)
SET OF SENTENCES IN A FORMAL LANGUAGE
First-order theory; Theory (model theory); Logical theory; Theory (logic); Supertheory; Subtheory; Logic theory; Deductive theory; Subtheories
In mathematical logic, a theory (also called a formal theory) is a set of sentences in a formal language. In most scenarios, a deductive system is first understood from context, after which an element \phi\in T of a deductively closed theory T is then called a theorem of the theory.
