Presburger arithmetic is the first-order theory of the natural numbers with addition, named in honor of Mojżesz Presburger, who introduced it in 1929.

* Mojżesz Presburger, 1929, " Über die Vollständigkeit eines gewissen Systems der Arithmetik ganzer Zahlen, in welchem die Addition als einzige Operation hervortritt " in Comptes Rendus du I congrès de Mathématiciens des Pays Slaves.

In 1929, Presburger proved that Peano arithmetic without multiplication was consistent, complete, and decidable.

Originally his work focused on technique-some argue that it had that focus at the cost of relevance, especially in Rain ( Regen, 1929 ), a 10-minute short filmed over 2 years which features impressive cinematography and a number of ' characters ' but no information about them aside from what was visible, and in The Bridge ( De Brug, 1928 ), which showed a frank admiration of engineering and also featured a number of " characters " but again did not give any information about them.

The donut spelling also showed up in a Los Angeles Times article dated August 10, 1929 in which Bailey Millard jokingly complains about the decline of spelling, and that he " can't swallow the ' wel-dun donut ' nor the ever so ' gud bred '.

His audience rapidly showed a preference for implausible adventures, however, and the movement away from Gernsback's idealism accelerated when the magazine changed hands in 1929.

In 1929, Long Lance entered the film world, starring in the silent film The Silent Enemy: An Epic of the American Indian, which showed traditional ways of Ojibwa people.

The company showed profits in the 1929 and 1930 years but with the economic downturn in 1931 Rover reported a loss of £ 77, 529.

Jacobson ( 1930 ) developed hardware to measure EMG voltages over time, showed that cognitive activity ( like imagery ) affects EMG levels, introduced the deep relaxation method Progressive Relaxation, and wrote Progressive Relaxation ( 1929 ) and You Must Relax ( 1934 ).

Studio in academy become center of artistic life ; it has concentrated bunch of student, four groups have showed from among which ( who ) realizing esthetic foundation of champion company st. 1925-1930 ( ) Łukasza, warsaw school ( 1929 – 1939 ), 1932 ( Loża Wolnomalarska, from 1935 paint ) Loża and group fourth ( 1935 – 1936 ).

She also showed a keen interest in his designs, when he showed in Paris in 1927 and 1929.

In 1929, during his work on the Banach – Tarski paradox, John von Neumann defined the concept of amenable groups and showed that no amenable group contains a free subgroup of rank 2.

The coat of arms was created 1929 replacing the old coat of arms which showed a blue chapel on a green hill.

Her first talkie, New York Nights ( 1929 ), showed that she could speak and act acceptably in talkies.

Yet even sixty years later the historian Claude G. Bowers in his partisan history The Tragic Era ( 1929 ) showed a mean comfort in the fate of Richardson, and the tarnishing of Beecher, Colfax, and Greeley by the scandal ( as though they were responsible, not McFarland ).

Adevărul also published a 1929 piece by Nicolae Constantin Batzaria, in which the latter showed his adversity to radical forms of feminism, recommending women to find their comfort in marriage.

After the crash of the New York stock market in 1929, Schad could no longer rely on his father's financial support, and he largely stopped painting in the early 1930s In 1937, unknown to him, the Museum of Modern Art showed three Schadographs, given by Tristan Tzara, in a show about Dada and Surrealism.

Formulated in 1929 by Sir Nevill Francis Mott and Werner Heisenberg, it was resolved by a calculation done by Mott that showed that the correct quantum mechanical system must include the wave functions for the atoms in the cloud chamber as well as that for the alpha ray.

As proof, he produced a May 2, 1929 article from the Berliner Tageblatt, where Zörgiebel had written a defense of his actions that showed its political basis.

It showed the first talking movie seen in Northern Michigan in 1929 when it was known as the Lyric Theatre.

Edna Ferber's novel Show Boat ( 1926 ), Jerome Kern and Oscar Hammerstein II's famous musical play based on it ( 1927 ), and the film versions ( 1929, 1936, 1951 ), showed this type of theater.

In 1929, they published Harry Crosby's volume of verse, Mad Queen, which showed the influence of Surrealism and which included withering attacks on Bostonian tradition.

Agner Krarup Erlang ( January 1, 1878 – February 3, 1929 ) was a Danish mathematician, statistician and engineer, who invented the fields of traffic engineering and queueing theory.

In 1929, Edwin Hubble provided an observational basis for Lemaître's theory.

Murray Gell-Mann (; born September 15, 1929 ) is an American physicist who received the 1969 Nobel Prize in physics for his work on the theory of elementary particles.

File: Broglie Big. jpg | Louis de Broglie ( 1892-1987 ): researched quantum theory, discovered the wave nature of electrons, awarded the 1929 Nobel Prize in Physics, ideas on the wave-like behavior of particles used by Erwin Schrödinger in his formulation of wave mechanics.

Sigmund Freud's well known work, Civilization and Its Discontents ( 1929 ), included an analysis of history based on his theory of psychoanalysis.

Nevanlinna gave a fuller account of the theory in the monographs La théoreme de Picard – Borel et la théorie des fonctions méromorphes ( 1929 ) and Eindeutige analytische Funktionen ( 1936 ).

In 1929 he published his first important essay on econometric methodology, " Correlation and scatter in statistical variables ", followed in the same year by " Statics and dynamics in economic theory ", which introduced dynamics in economic analysis.

In December 1929, Soviet leader Joseph Stalin gave a famous speech praising " practice " above " theory ", elevating the political bosses above the scientists and technical specialists.

For instance, in 1929 Emmy Noether at Bryn Mawr wrote on " hypercomplex quantities and representation theory ".

* 1929 – Paul Adrien Maurice Dirac and Werner Karl Heisenberg develop the quantum theory of ferromagnetism

This form of archaeological theory was first developed in the Soviet Union in 1929, when a young archaeologist named Vladislav I. Ravdonikas ( 1894 – 1976 ) published a report entitled " For a Soviet history of material culture ".

In 1929, Thorndike addressed his early theory of learning, and claimed that he had been wrong.

* Jacob Clayton, born 1929, biochemist who worked closely with John E. Amoore developing the stereochemical theory for olfaction

Before and after the Wall Street Crash of 1929 Senator Glass used this commercial banking theory to criticize banks for their involvement in securities markets.

In response to this Stanisław Jaśkowski ( 1929 ) and Gerhard Gentzen ( 1934 ) independently provided such systems, called calculi of natural deduction, with Gentzen's approach introducing the idea of symmetry between the grounds for asserting propositions, expressed in introduction rules, and the consequences of accepting propositions in the elimination rules, an idea that has proved very important in proof theory.

Malone's view was the dominant one until 1929, when Peter Alexander and Madeleine Doran, working independently of one another, re-established the dominance of the bad quarto theory.

The theory is based on an interpretation of demographic history developed in 1929 by the American demographer Warren Thompson ( 1887 – 1973 ).

There was also a small numerical error in the final equation given by Fowler-Nordheim theory for CFE current density: this was corrected in the 1929 paper of.

This parameter A < sub > r </ sub > was introduced into CFE theory by Stern, Gossling and Fowler in 1929 ( who called it a " weighted mean area ").

Cowles concluded that a buy-and-hold strategy produced 15. 5 % annualized returns from 1902 – 1929 while the Dow theory strategy produced annualized returns of 12 %.

Wanniski's 1978 book, The Way The World Works, documented his theory that the US Senate's floor votes on the Smoot-Hawley tariff legislation coincided day-to-day with the Wall Street stock market Crash of 1929, and that the Great Depression was the result of the Smoot-Hawley tariff, rather than any failure of classical economics.

From 1906 onwards he published a five-volume expansion of his history of determinants, the final part ( 1929 ) taking the theory to 1920.

In May 1929, Warlimont was attached to the U. S. Army for a year to study American industrial mobilization theory during wartime.