All articles starting with S
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Schwarz (surname)
Schwarz (also Schwartz, Swartz) is a German and Ashkenazic Jewish surname meaning "black", from Middle High German swarz, originally a nickname for dark hair or complexion; about 236,782 bearers, most common in Germany.
Schwarz alternating method
The Schwarz alternating method is an iterative domain decomposition technique for solving partial differential equations on overlapping subdomains, devised by Hermann Schwarz in 1869 and now used mainly as a parallel preconditioner.
Schwarz Digits
Schwarz Digits KG is the IT and digital division of the Schwarz Group, the German retail group behind Lidl and Kaufland, established in 2023 with about 7,500 employees.
Schwarz Group investment in Cohere
The Schwarz Group investment in Cohere is a €500 million commitment announced in 2026 by the German retail group behind Lidl and Kaufland to lead Cohere's Series E round.
Schwarze Pumpe power station
Schwarze Pumpe power station (Kraftwerk Schwarze Pumpe) is a German lignite-fired power station near Spremberg in Brandenburg, commissioned in 1997 and scheduled to run until 2038.
Schwarzenberg Carpet
The Schwarzenberg carpet is a large 16th-century Safavid Persian carpet, named for the Austrian family that once owned it, now in the Museum of Islamic Art, Doha.
Schwarzite
Schwarzite, also called a Mackay–Terrones crystal, is a hypothetical porous carbon allotrope with negative curvature from seven- and eight-membered rings, proposed in 1991 and still unsynthesized.
Schwarzkopf (hair care)
Schwarzkopf is a German hair care, styling, and coloration brand founded in Berlin in 1898 by Hans Schwarzkopf. Owned by Henkel, it sells lines such as Keratin Color and got2b.
Schwarzschild (lunar crater)
Schwarzschild is a 211.42-km-diameter impact crater on the Moon's northern farside, centered at 70.08°N, 121.57°E, with a superposed central crater and LROC low-Sun mosaic coverage.
Schwarzschild coordinates
Schwarzschild coordinates, also called the Schwarzschild chart, are the coordinates in which the Schwarzschild solution of general relativity takes its standard form; they break down at the event horizon.
Schwarzschild geodesics
Schwarzschild geodesics, also called geodesics of the Schwarzschild metric, are the paths of freely falling particles and light rays outside a spherical, non-rotating, uncharged mass.
Schwarzschild metric
The Schwarzschild metric, also called the Schwarzschild geometry, is the exact solution of the vacuum Einstein field equations for spacetime outside a non-rotating, uncharged, spherically symmetric mass.
Schwarzschild precession
Schwarzschild precession is the relativistic rotation of an orbit's ellipse, seen in Mercury's perihelion shift and in the star S2's orbit around the black hole Sgr A.
Schwarzschild radius
The Schwarzschild radius, or gravitational radius, is the radius at which a mass's escape velocity equals the speed of light; compressing a mass within it forms a black hole.
Schwarzschild–de Sitter metric
The Schwarzschild–de Sitter metric, or Kottler spacetime, is a general relativity solution describing a black hole with both a black hole and a cosmological horizon.
Schwechat refinery
The Schwechat refinery is the only oil refinery in Austria, operated by OMV just outside Vienna. Built in 1960, it processes 9.6 million tons of crude annually.
Schweinsgalopp
Schweinsgalopp (Galloping Pigs, Pig Trotters, All the Way Home) is a 1992 Heinz Meister pig-racing card game from Ravensburger; players move five shared pigs to win food cards, Kinderspiel des Jahres 1992 winner.
Schweizer Hitparade
The Schweizer Hitparade, also known as the Offizielle Schweizer Hitparade, is the official weekly music chart of Switzerland, ranking best-selling singles and albums and serving as the basis for Swiss Gold and Platinum certifications.
Schweizer SGM 2-37
The Schweizer SGM 2-37, designated TG-7A in Air Force service, is a two-place American motor glider built by Schweizer Aircraft of Elmira, New York, from 1982.
Schweppes
Schweppes, carbonated soft drink and mixer brand founded in 1783 in Geneva by Johann Jacob Schweppe; creator of tonic water (1870); now split among Coca-Cola, Suntory, and Keurig Dr Pepper by country.
Schwerer Gustav
Schwerer Gustav, known as Dora, was a German 80 cm (800 mm) railway gun built by Krupp, the largest-caliber rifled artillery piece ever used in combat.
Schwerer Panzerspähwagen
The Schwerer Panzerspähwagen (German for "heavy armored reconnaissance vehicle") was the general German designation for heavy armored cars, including the Sd.Kfz. 231, 232, 233, and 234 of World War II.
Schwerin
Schwerin is a city in northern Germany and the state capital of Mecklenburg-Vorpommern, founded by Henry the Lion in 1160 and known for its island castle, a UNESCO World Heritage Site since 2024.
Schwerin Residence Ensemble
Schwerin Residence Ensemble (Residenzensemble Schwerin), a 19th-century architectural and landscape ensemble of 38 elements around Schwerin Castle, capital of Grand Duchy of Mecklenburg-Schwerin; UNESCO World Heritage site since 27 July 2024, criterion (iv), Germany's 54th site.
Schwertmannite
Schwertmannite is a poorly crystalline iron(III) oxyhydroxy-sulfate mineral with formula Fe₈O₈(OH)₈₋₂ₓ(SO₄)ₓ·nH₂O, recognized in 1992 and named for soil scientist Udo Schwertmann, forming yellowish-brown ochre precipitates in acidic mine drainage.
Schwing
Schwing is a German manufacturer of concrete construction machinery based in Herne, founded in 1934, known for its concrete pumps and for the first oil-hydraulic concrete pump in 1957.
Schwinger effect
The Schwinger effect, also called the Schwinger mechanism, is the production of electron-positron pairs from the vacuum by a strong electric field, predicted in 1951 and not yet observed.
Schwinger model
The Schwinger model is quantum electrodynamics in 1+1 dimensions with a single Dirac fermion, introduced by Julian Schwinger in 1962 and exactly solvable in the massless limit.
Schwinger–Dyson equation
The Schwinger–Dyson equation, also written Dyson–Schwinger equation or DSE, is the exact quantum equation of motion of a quantum field theory: coupled integral equations for its Green's functions, giving a nonperturbative alternative to perturbation theory.
Schwinger–Keldysh formalism
The Schwinger–Keldysh formalism, also called the closed-time-path or in-in formalism, is a real-time quantum field theory method that computes expectation values, pioneered by Julian Schwinger and Leonid Keldysh.