- principal convergent of a
- матем.подходящая дробь для a
English-Russian scientific dictionary. 2008.
English-Russian scientific dictionary. 2008.
Filter (mathematics) — The powerset algebra of the set {1,2,3,4} with the upset colored green. The green elements make a principal ultrafilter on the lattice. In mathematics, a filter is a special subset of a partially ordered set. A frequently used special case is the … Wikipedia
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
centre — [ sɑ̃tr ] n. m. • 1275; lat. centrum, gr. kentron I ♦ 1 ♦ Point intérieur (d un cercle, d une sphère) équidistant de tous les points du cercle, de la sphère. Le centre d un disque. Le centre de la Terre. ♢ Centre de symétrie : point tel que tous… … Encyclopédie Universelle
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
Laurent series — A Laurent series is defined with respect to a particular point c and a path of integration γ. The path of integration must lie in an annulus (shown here in red) inside of which f(z) is holomorphic (analytic). In mathematics, the Laurent series of … Wikipedia
OPTIQUE - Images optiques — Les «pièces optiques» (lentilles et parfois miroirs), seules ou convenablement associées – on dira dans tous les cas les «systèmes optiques» –, permettent d’obtenir d’un objet, lumineux par lui même ou parce qu’il est convenablement éclairé, une… … Encyclopédie Universelle
Saintes — Pour les articles homonymes, voir Saintes (homonymie). 45° 44′ 47″ N 0° 38′ 00″ W … Wikipédia en Français
Absolute convergence — In mathematics, a series (or sometimes also an integral) of numbers is said to converge absolutely if the sum (or integral) of the absolute value of the summand or integrand is finite. More precisely, a real or complex series is said to converge… … Wikipedia
Oceanic trench — Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. The oceanic trenches are hemispheric scale long but narrow topographic depressions of the sea floor. They are also the… … Wikipedia
Mediolanum Santonum — Saintes Pour les articles homonymes, voir Saintes (homonymie). 45°44′47″N 0°38′00″O / … Wikipédia en Français
plate tectonics — plate tectonic, adj. Geol. a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past… … Universalium