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Constantine I
Constantine I or Constantine the Great , 288?-337, Roman emperor, b. Naissus (present-day Niš, Serbia). He was the son of Constantius I and Helena and was named in full Flavius Valerius Constantinus.
Rise to Power
When his father was made caesar (subemperor), Constantine was...
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conic section
conic section or conic , curve formed by the intersection of a plane and a right circular cone (conical surface). The ordinary conic sections are the circle , the ellipse , the parabola , and the hyperbola . When the plane passes through the vertex of the cone, the result is a point, a str...
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Constantin Guys
Constantin Guys , 1805?-1892, French watercolorist and draftsman, b. Holland. His work was published anonymously, most frequently in the Illustrated London News. Most of his witty drawings deal with the elegant society of his period, but he also drew, from life, scenes of the Crimean War.
Bi...
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algebraic geometry
algebraic geometry branch of geometry , based on analytic geometry , that is concerned with geometric objects (loci) defined by algebraic relations among their coordinates (see Cartesian coordinates ). In plane geometry an algebraic curve is the locus of all points satisfying the polynomial eq...
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Arc de Triomphe de l'Étoile
Arc de Triomphe de l'Étoile , imposing triumphal arch in Paris standing on an elevation at the end of the Avenue des Champs Élysées and in the center of the Place de l'Étoile, which is formed by the intersection of 12 radiating avenues. It commemorates the victories of Na...
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set
set in mathematics, collection of entities, called elements of the set, that may be real objects or conceptual entities. Set theory not only is involved in many areas of mathematics but has important applications in other fields as well, e.g., computer technology and atomic and nuclear physics.
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set
set in mathematics, collection of entities, called elements of the set, that may be real objects or conceptual entities. Set theory not only is involved in many areas of mathematics but has important applications in other fields as well, e.g., computer technology and atomic and nuclear physics.
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factor
factor in arithmetic, any number that divides a given number evenly, i.e., without any remainder. The factors of 12 are 1, 2, 3, 4, 6, and 12. Similarly in algebra, any one of the algebraic expressions multiplied by another to form a product is a factor of that product, e.g., a + b and a - b ar...
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Maxentius
Maxentius (Marcus Aurelius Valerius Maxentius) , d. 312, Roman emperor (306-12), son of Maximian . After Diocletian and Maximian had retired, the successor to Maximian, Constantius, died. The Romans, discontented with the shift of power away from Rome, supported Maxentius, who claimed the throne....
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Arles
Arles , city (1990 pop. 52,543), Bouches-du-Rhône dept., S central France, in Provence , on the Rhône River delta. Arles is an important railroad, shipping, agriculture, and industrial center with varied manufactures. It was a flourishing Roman town (Arelas) and the metropolis of Gaul i...
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