Models that do not unify all interactions using one simple Lie group as the gauge symmetry, but do so using semisimple groups, can exhibit similar properties and are sometimes referred to as Grand Unified Theories as well.

Theories about them have to rely on a preponderance of other evidence, which alone are not solid enough to warrant much conclusiveness.

Theories on consolidation are supported by concussion studies.

Theories of universals, including Platonic realism, are challenged to satisfy certain constraints on theories of universals.

Theories as to the cause of the increase are the possibility that the reduction of stomach acid reduces the amount of calcium dissolved in the stomach or that PPIs may interfere with the breakdown and rebuilding of bone by interfering with the acid production of osteoclasts.

Theories that place a great deal of emphasis on learning are often, but not always, more optimistic than theories that do not emphasize learning.

Theories are analytical tools for understanding, explaining, and making predictions about a given subject matter.

Theories in various fields of study are expressed in natural language, but are always constructed in such a way that their general form is identical to a theory as it is expressed in the formal language of mathematical logic.

Theories may be expressed mathematically, symbolically, or in common language, but are generally expected to follow principles of rational thought or logic.

Theories used in applications are abstractions of observed phenomena and the resulting theorems provide solutions to real-world problems.

Theories are distinct from theorems.

Theories are abstract and conceptual, and to this end they are always considered true.

Theories whose subject matter consists not in empirical data, but rather in ideas are in the realm of philosophical theories as contrasted with scientific theories.

Theories are improved ( or replaced by better theories ) as more evidence is gathered, so that accuracy in prediction improves over time ; this increased accuracy corresponds to an increase in scientific knowledge.

He later regarded it as a flawed exposition of his logical system, and wanted An Investigation of the Laws of Thought ( 1854 ), on Which are Founded the Mathematical Theories of Logic and Probabilities to be seen as the mature statement of his views.

Theories which claim that morality is derived from reasoning about implied imperatives ( universal prescriptivism ), the edicts of a god ( divine command theory ), or the hypothetical decrees of a perfectly rational being ( ideal observer theory ), are considered anti-realist in the robust sense used here, but are considered realist in the sense synonymous with moral universalism.

Theories of nucleosynthesis are tested by calculating isotope abundances and comparing with observed results.

Theories denying or belittling the supernatural order, are historically classified into three groups:

Theories have been proposed that these figures are connected to valkyries.

Theories of creativity ( particularly investigation of why some people are more creative than others ) have focused on a variety of aspects.

Theories invoking divergent rather than convergent thinking ( such as Guilford ), or those describing the staging of the creative process ( such as Wallas ) are primarily theories of creative process.

A slightly larger count ( but still better than split radix for N ≥ 256 ) was shown to be provably optimal for N ≤ 512 under additional restrictions on the possible algorithms ( split-radix-like flowgraphs with unit-modulus multiplicative factors ), by reduction to a Satisfiability Modulo Theories problem solvable by brute force ( Haynal & Haynal, 2011 ).

Theories that Cronje was murdered on the orders of a cricket betting syndicate flourished after his death and were most recently re-floated by former Nottinghamshire coach Clive Rice in the wake of the death of Pakistan coach Bob Woolmer in March 2007.

Theories of this kind predicted paths of the planets moderately well, until Johannes Kepler was able to show that the motions of planets were in fact ( at least approximately ) elliptical motions.

As Rolf Wiggershaus recounts in The Frankfurt School, Its History, Theories and Political Significance ( MIT 1995 ), Lazarsfeld was the director of a project, funded and inspired by David Sarnoff ( the head of RCA ), to discover both the sort of music that listeners of radio liked and ways to improve their " taste ", so that RCA could profitably air more classical music.

Gamow was working on a textbook entitled Basic Theories in Modern Physics, with Richard Blade, but it was not completed before he died.

Theories include sudden death by a plague that was sweeping through the city or another natural death.

Theories include that it was named for Louisa County, Virginia, or a corruption of the name of the river (" Levisa ") or that it was named after Louisa Swetnam, one of the first children born in the area to Europeans.

Theories that the painting is about duality ( city and country, male and female ) have been dismissed since radiography has shown that in the earlier stages of the painting the soldier to the left was a seated female nude.

Theories vary as to when the jewel was made and for what occasion.

The philosopher Karl Kautsky ( 1854 – 1938 ) published a partial edition of Marx's surplus-value critique, and later published a full, three-volume edition as Theorien über den Mehrwert ( Theories of Surplus Value, 1905 – 1910 ); the first volume was published in English as A History of Economic Theories ( 1952 ).

George Green ( 14 July 1793 – 31 May 1841 ) was a British mathematical physicist who wrote An Essay on the Application of Mathematical Analysis to the Theories of Electricity and Magnetism ( Green, 1828 ).

In 1847 he was made tutor of his college, and in 1853 he delivered the Bampton lectures, his subject being The Atoning Work of Christ viewed in Relation to some Ancient Theories.

Theories about his identity made at the time included that he was a Marshal of France ; or the English Richard Cromwell, son of Oliver Cromwell ; or François, Duke of Beaufort.

Theories of the derivation of the name ' Gateshead ' include ' head of the ( Roman ) road ' or ' goat ’ s headland ', as the River Tyne at this point was once roamed by goats.

Theories exist that its inventor was Christophe Des Rosiers, furniture maker for the French Royal Family, but Marc Andre Jacoud was also rumored to have been the inventor.

Functionalism had been the dominant paradigm but, in the 1960s, there was a shift towards Social Control Theories, conflict criminology, and labeling theories that tried to explain the emerging and more radical social environment.

The generalization to N =( 2, 2 ) supersymmetric theories in 2 spacetime dimensions was proposed by Cumrun Vafa and Nicholas Warner in the November 1988 article Catastrophes and the Classification of Conformal Theories, in this generalization one imposes that the superpotential possess a degenerate critical point.

This theory was adapted and augmented by researchers interested in the relationship between technology and social structures ( see Theories of technology ), such as information technology in organizations.

Marx's Theories of Surplus Value was edited by Karl Kautsky.

Theories which assert that the universe has an infinite age, including many of the theories described above, fail to account for the abundance of deuterium in the cosmos, because deuterium easily undergoes nuclear fusion in stars and there are no known astrophysical processes other than the Big Bang itself that can produce it in large quantities.

Theories about the site have focused on the idea of inversion, as represented by the upside-down central tree stump and the single post turned 180 degrees from the others within the circle itself.