42,772 articles
Krzysztof Belczyński
Krzysztof Belczyński was a Polish theoretical astrophysicist who predicted stellar black hole masses and merger rates later confirmed by the first gravitational-wave detection in 2015.
Krzysztof Gawedzki
Krzysztof Gawedzki, also Krzysztof Gawędzki, was a Polish-French mathematical physicist at ENS Lyon who proved the first intermittency results in turbulence and shared the 2022 Dannie Heineman Prize.
Krzysztof Gofryk
Krzysztof Gofryk is a condensed matter and nuclear materials physicist at Idaho National Laboratory, directing the Center for Quantum Actinide Science and Technology and holding a Presidential Early Career Award.
Krzysztof Matyjaszewski
Krzysztof Matyjaszewski is a polymer chemist at Carnegie Mellon University in Pittsburgh, teaching there since 1985, best known for discovering atom transfer radical polymerization (ATRP) in 1994 and winning the 2011 Wolf Prize.
Krzysztof Pachucki
Krzysztof Pachucki is a Polish theoretical physicist at the University of Warsaw whose 1996 Lamb-shift theory for muonic hydrogen enabled extracting the proton charge radius from spectroscopy.
Krzysztof Szalewicz
Krzysztof Szalewicz is a Polish-born American physicist at the University of Delaware known for co-developing symmetry-adapted perturbation theory (SAPT) and predicting molecular crystal structures from first principles.
KS 1731-260
KS 1731-260 is a neutron star low-mass X-ray binary near the Galactic center, discovered in 1989, known for a 12.5-year outburst and a 12-hour superburst.
Ksi Bootis
Ksi Bootis (ξ Boötis, ksi Boo) is a nearby binary star in Boötes about 22 light-years away: a G7Ve dwarf and K5Ve companion in a roughly 151-year orbit, a BY Draconis variable with no confirmed planets.
Kubo formula
The Kubo formula, formulated by Ryogo Kubo in 1957, is a linear response result expressing transport coefficients like electrical conductivity as equilibrium time-correlation functions of currents.
Kudryashov method
The Kudryashov method is an analytic technique for finding exact closed-form solutions of nonlinear differential equations, introduced by N.A. Kudryashov in 1990 for the Kuramoto–Sivashinsky equation.
Kugelblitz (astrophysics)
A kugelblitz, German for "ball lightning," is a hypothetical black hole formed by concentrating light rather than collapsing matter; 2024 calculations suggest quantum effects prevent it.
Kui Yu
Kui Yu (余睽) is a materials chemist who studies how colloidal semiconductor quantum dots and magic-size clusters form, and a professor at Sichuan University since 2014.
Kukersite
Kukersite is a marine oil shale of Ordovician age found in northeastern Estonia and northwestern Russia, mined commercially since 1916 as Estonia's main oil shale.
Kullback–Leibler divergence
The Kullback–Leibler divergence, or KL divergence, is an asymmetric measure of how different one probability distribution is from another, introduced by Kullback and Leibler in 1951 and equal to zero only when the distributions coincide.
Kummer theory
Kummer theory, created by Ernst Eduard Kummer, classifies cyclic extensions of a field obtained by adjoining nth roots of elements, assuming the field contains roots of unity.
Kūmsong Vallis
Kūmsong Vallis (Kumsong Vallis), a 700 km valley system on Venus centered at -59.00°, 152.50°E, IAU-approved in 1997, named with the Korean word for the planet Venus.
Kun Na
Kun Na (나건) is a South Korean professor of biomedical chemical engineering at the Catholic University of Korea, known for polymeric biomaterials and drug delivery research.
Kung's conjecture
Kung's conjecture is a theorem in extremal matroid theory stating that simple matroids over a finite field grow linearly, proved by Geelen and Whittle in 2003.
Kunihiko Kodaira
Kunihiko Kodaira (小平 邦彦, 1915–1997) was a Japanese mathematician who worked on complex manifolds and algebraic varieties, and in 1954 became the first Japanese recipient of the Fields Medal.
Kunioki Mima
Kunioki Mima (三間 圀興, 1945–2025) was a Japanese plasma physicist who co-discovered the Hasegawa–Mima equation, directed Osaka University's Institute of Laser Engineering, and won the Hannes Alfvén and Edward Teller prizes.
Kuo‐Wei Huang
Kuo-Wei Huang, known professionally as Andy Huang, is a Taiwanese chemist and professor at KAUST in Saudi Arabia who works on catalysis, electrocatalysis, and formic acid as an energy carrier.
Kùr
Kùr, the Sumerian gur or Akkadian kurru, was ancient Mesopotamia's largest dry-capacity unit, used from the third millennium BCE to measure grain, beer, and foodstuffs.
Kuramoto model
The Kuramoto model, introduced by Yoshiki Kuramoto in 1975, is a mathematical model of synchronization in which coupled phase oscillators entrain into collective oscillation above a critical coupling strength.
Kuranakh
Kuranakh (Куранах) is a gold mining district in the Aldan District of Yakutia, Russia, comprising eleven gold deposits and a large buried placer worked since the 1920s.
Kurchatov Institute
The Kurchatov Institute is Russia's leading nuclear research institution, founded in Moscow in 1943 under Igor Kurchatov, where the first Soviet atomic bomb and the first tokamak were developed.
Kuroshio Current (黒潮)
The Kuroshio, also known as the Japan current, is a warm ocean current flowing northeastward past Taiwan and Japan, the Pacific counterpart of the Gulf Stream.
Kurt Alder
Kurt Alder (1902–1958) was a German chemist who, with his teacher Otto Diels, discovered the Diels–Alder reaction and shared the 1950 Nobel Prize in Chemistry for it.
Kurt Bennewitz
Kurt Bennewitz (1886–1964) was a German physical chemist, professor at Jena from 1927 and later at Würzburg and Stuttgart, nominated for the 1929 Nobel Prize in Chemistry.
Kurt Binder
Kurt Binder (1944–2022) was an Austrian statistical physicist who pioneered Monte Carlo simulation as a tool of theoretical physics, introduced the Binder cumulant, and won the Boltzmann Medal.
Kurt Gödel
Kurt Friedrich Gödel was an Austrian-born logician and mathematician best known for the incompleteness theorems, proving that no consistent system of arithmetic can prove its own consistency.