Physical world and mathematics

Karl Pearson

Karl Pearson (1857–1936) was an English mathematician and biostatistician who founded modern statistics at University College London, introducing the chi-squared test and the correlation coefficient.

Karl Reinhardt (German mathematician)

Karl August Reinhardt (1895–1941) was a German mathematician, professor at Greifswald, who classified plane-tiling polygons, named Reinhardt polygons, and completed part of Hilbert's eighteenth problem in 1928.

Karl Schwarzschild

Karl Schwarzschild (1873–1916) was a German astronomer and astrophysicist who, while serving on the Russian front in World War I, found the first exact solution to Einstein's field equations of general relativity.

Karl Sigmund

Karl Sigmund, born 1945 in Lower Austria, is an Austrian mathematician and pioneer of evolutionary game theory who taught at the University of Vienna from 1974 to 2013.

Karl Stein (mathematician)

Karl Stein (1913–2000) was a German mathematician, professor at Munich from 1955, whose 1951 definition of Stein manifolds became a foundational object of complex geometry.

Karl Uno Ingard

Karl Uno Ingard, known as K. Uno Ingard, was a Swedish-born physicist and acoustician who spent his career at MIT, working in acoustics and plasma physics.

Karl von Auwers

Karl Friedrich von Auwers (1863–1939) was a German organic chemist who coined the term stereochemistry in 1888 and directed the chemical institutes at Greifswald and Marburg.

Karl W. Butzer

Karl W. Butzer (1934–2016) was a German-born American geographer and geoarchaeologist who pioneered geoarchaeology, studied ancient Egypt's environment, and taught at the University of Texas at Austin.

Karl Weierstraß

Karl Weierstraß (Karl Theodor Wilhelm Weierstrass) was a German mathematician, born in Ostenfelde in 1815 and working in Berlin, who rebuilt analysis on arithmetical foundations and constructed the theory of complex functions.

Karl Wieghardt

Karl Wieghardt is a German inorganic and bioinorganic chemist, a Max Planck director in Mülheim from 1994, known for high-valent iron and manganese complexes, metalloenzyme models, and noninnocent ligands.

Karl Ziegler

Karl Ziegler was a German chemist who shared the 1963 Nobel Prize in Chemistry with Giulio Natta for polymer discoveries and directed the Max-Planck-Institut für Kohlenforschung in Mülheim.

Karl Zsigmondy

Karl Zsigmondy (1867–1925) was an Austrian mathematician who spent his career at the Vienna Technische Hochschule and is known for Zsigmondy's theorem on primitive prime divisors.

Karl-Friedrich Bonhoeffer

Karl-Friedrich Bonhoeffer (1899–1957) was a German physical chemist who discovered the spin isomers of hydrogen with Paul Harteck in 1929 and became the first director of the Max Planck Institute for Physical Chemistry in Göttingen.

Karl-Hermann Geib

Karl-Hermann Geib (1908–1949) was a German physical chemist who in 1943 developed the dual-temperature Girdler sulfide process for producing heavy water, developed in parallel with Jerome S. Spevack.

Karlheinz Schwarz

Karlheinz Schwarz is an Austrian quantum chemist and professor at TU Wien, co-developer of WIEN2k, a widely used code for calculating the electronic structure of solids.

Kármán line

The Kármán line, also known as the Von Kármán line or Karman limit, is the conventional boundary between Earth's atmosphere and outer space, set at 100 kilometers altitude.

Kármán vortex street

The Kármán vortex street, or von Kármán vortex street, is a repeating pattern of swirling vortices forming in the wake of a bluff body in fluid flow.

Kármán–Howarth equation

The Kármán–Howarth equation is an exact evolution equation, derived from the Navier–Stokes equations, for two-point velocity correlations in homogeneous isotropic turbulence, published by Theodore von Kármán and Leslie Howarth in 1938.

Karnaugh map

A Karnaugh map (K-map) is a grid-based method for simplifying Boolean algebra expressions, invented by Maurice Karnaugh at Bell Labs in 1953 for telephone switching circuits.

Karol Borsuk

Karol Borsuk (1905–1982) was a Polish mathematician of the Warsaw School who founded the theory of retracts, proved the Borsuk–Ulam theorem, and posed Borsuk's conjecture.

Karol Grela

Karol Grela (born 1970, Warsaw) is a Polish chemist at the University of Warsaw known for designing ruthenium olefin metathesis catalysts, including the commercially sold Grela catalyst.

Karol Olszewski

Karol Stanisław Olszewski was a Polish chemist and physicist, professor at the Jagiellonian University in Kraków, who in 1883 with Zygmunt Wróblewski first liquefied oxygen and nitrogen.

Oct 22, 2026

Károly Than

Károly Than (Carl von Than, Than Károly) was a Hungarian chemist who discovered carbonyl sulfide and is regarded as the founder of modern Hungarian scientific chemistry.

Oct 15, 2026

Karoo Supergroup

The Karoo Supergroup is a thick succession of sedimentary and volcanic rocks spanning the late Carboniferous to Early Jurassic across southern Africa, rich in fossils of mammal-like reptiles.

Oct 15, 2026

Karren

Karren, also known as lapies, are small-scale dissolution landforms, usually under 10 m, carved into limestone and other soluble rocks, and common across karst terrains.

Karst

Karst is a landscape and topography formed when water dissolves soluble rocks such as limestone and dolomite, producing sinkholes, caves, springs, and underground drainage; it covers about 10 percent of Earth's land surface.

Oct 15, 2026

Karst hydrology

Karst hydrology is the study of water movement through karst, landscapes formed in soluble limestone and dolomite, which supply drinking water to a quarter of the world.

Karsten Meyer (chemist)

Karsten Meyer is a German inorganic and coordination chemist who has held the Chair of Inorganic and General Chemistry at FAU Erlangen-Nürnberg since 2006, after serving at UC San Diego.

Karsten Pruess

Karsten Pruess is a German-trained theoretical physicist and reservoir engineer at Lawrence Berkeley National Laboratory, best known as chief author of the TOUGH2 simulator family.