** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** Antichain principle: Every partially ordered set has a maximal antichain.

** Microevolution: species — speciation — adaptation — selection — natural selection — directional selection — sexual selection — genetic drift — sexual reproduction — asexual reproduction — colony — allele frequency — neutral theory of molecular evolution — population genetics — Hardy-Weinberg principle

** to the greatest benefit of the least advantaged, consistent with the just savings principle, and

** The segmented DAC, which combines the thermometer-coded principle for the most significant bits and the binary-weighted principle for the least significant bits.

** In the mid-1950s, a second land reform during the Great Leap Forward compelled individual farmers to join collectives, which, in turn, were grouped into People's communes with centrally controlled property rights and an egalitarian principle of distribution.

** Li ( Neo-Confucianism ), philosophical concept of principle

** Some, including the leadership of the Society of St Pius X, hold that it is in principle valid as a sacramental rite but maintain that the revisions in the liturgy are displeasing to God, and that it is often celebrated improperly to the extent of being sacramentally invalid.

** Some, including many sedevacantists, see it as categorically invalid in principle and entirely unacceptable.

** Blackstone's formulation, a principle in criminal law named for the jurist

** Duality ( projective geometry ), general principle of projective geometry

** Morton's fork coup, a technique in the game of Bridge that uses the principle of Morton's Fork

** What are ( necessary and sufficient ) conditions for consistency of a learning process based on the empirical risk minimization principle?

** A-Frame house, a house following the same principle

** Adage, a principle in the form of a memorable saying

** Legal analyses on the principle of laïcité ( decisions and opinions of the Conseil d ' État )

** Equivalence principle

** ( 1949 ): Human behavior and the principle of least effort

** Sigmund Freud's will to pleasurepleasure principle

** Stalin ordered that the persecution be enhanced: NKVD is " four years late " in crushing the opposition, according to his principle of " aggravation of class struggle "

** Specific amorality, the absence of some particular moral standard, principle, code, or knowledge

** the Government decision of December 2002 to agree in principle to the provision of additional resources was made contingent on the outcome of the review, and so had proved meaningless.

** T31 / M5A2-Similar in principle to the M3A2, a vehicle developed by the US Ordnance Department to combine the production of the M5 and M9 into a single vehicle.

** Jan Tyssowski was Dictator from 24 February 1846-2 March 1846.

** Astronautilía Hvězdoplavba by Jan Křesadlo ( 1995 )

** Harpsichord by Jan Couchet, Antwerp, 1650

** Jan Miner, American actress ( d. 2004 )

** Jan Eggum, Norwegian singer and songwriter

** Jan Smithers, American actress

** Jan Axel Blomberg, Norwegian drummer

** Jan Masaryk, Foreign Minister of Czechoslovakia ( b. 1886 )

** Jan Leeming, former BBC newsreader

** Jan Kodes, Czech tennis player

** Jan Akkerman, Dutch rock guitarist ( Focus )

** Jan Kuehnemund, American guitarist ( Vixen )

** Jan Berglin, Swedish cartoonist

** Jan Wouters, Dutch football player and manager

** Dirk Jan de Geer, Prime Minister of the Netherlands ( b. 1870 )

** Pianist Ignacy Jan Paderewski becomes the second Prime Minister of Poland.

** Jan Jakub Kolski, Polish film director

** Jan Peter Balkenende, Prime Minister of the Netherlands

** Floris Jan Bovelander, Dutch field-hockey player

** Jan Kiepura, Polish tenor and actor ( b. 1902 )

** Jan Józef Lipski, Polish critic, historian and politician ( b. 1926 )

** Dean Torrence, American singer ( Jan and Dean )

** Jan Pronk, Dutch politician and diplomat

** Jan Sterling, American actress ( died 2004 )

** Jan Ullrich, German professional road bicycle racer