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Perko pair. In the mathematical theory of knots, the Perko pair, named after Kenneth Perko, is a pair of entries in classical knot tables that actually represent the same knot. In Dale Rolfsen 's knot table, this supposed pair of distinct knots is labeled 10 161 and 10 162. In 1973, while working to complete the classification by knot type of ...
The Somnium Scipionis is a portion of the sixth and final book from Cicero's De re publica, but because parts of Cicero's whole work are missing, Somnium Scipionis represents nearly all that remains of the sixth book. [1] The main reason that the Somnium Scipionis survived was because in the fifth-century, the Latin writer Macrobius wrote a ...
Gracchus (brother-in-law) Publius Cornelius Scipio Africanus Aemilianus (185 BC – 129 BC), known as Scipio Aemilianus or Scipio Africanus the Younger, was a Roman general and statesman noted for his military exploits in the Third Punic War against Carthage and during the Numantine War in Spain. He oversaw the final defeat and destruction of ...
The axiom of pairing is generally considered uncontroversial, and it or an equivalent appears in just about any axiomatization of set theory. Nevertheless, in the standard formulation of the Zermelo–Fraenkel set theory, the axiom of pairing follows from the axiom schema of replacement applied to any given set with two or more elements, and thus it is sometimes omitted.
Knot tabulation. A small table of all prime knots (excluding mirror images) with 7 crossings or fewer. Ever since Sir William Thomson 's vortex theory, mathematicians have tried to classify and tabulate all possible knots. As of May 2008, all prime knots up to 16 crossings have been tabulated. [1] The major challenge of the process is that many ...
Scipio Africanus Freeing Massiva (alt. Scipio Liberating Massiva) is a painting depicting a scene from ancient Roman history by the Venetian artist Giovanni Battista Tiepolo (alt. Giambattista Tiepolo), painted between 1719 and 1721. [1] The painting depicts the Roman general Scipio Africanus after the 209 BCE Battle of Baecula in present-day ...
Goldbach's comet is the name given to a plot of the function (), the so-called Goldbach function (sequence A002372 in the OEIS).The function, studied in relation to Goldbach's conjecture, is defined for all even integers > to be the number of different ways in which E can be expressed as the sum of two primes.
In 1998 it was determined that homologous pairing in Drosophila occurs through independent initiations (as opposed to a directed, 'processive zippering' motion). [4] [8]The first RNAi screen (based on DNA FISH [9]) was carried out to identify genes regulating D. melanogaster somatic pairing in 2012, [10] described at the time as providing "an extensive “parts list” of mostly novel factors".