42,772 articles
Nikolai Luzin
Nikolai Luzin, also known as Nikolai Nikolaevich Luzin, was a Russian and Soviet mathematician who founded the Moscow school of function theory and descriptive set theory.
Nikolai Makarov
Nikolai Makarov is a Russian mathematician, the Richard Merkin Professor of Mathematics at Caltech, known for his 1985 theorem that harmonic measure on simply connected planar domains has Hausdorff dimension 1.
Nikolai Mnev
Nikolai Mnev (Николай Евгеньевич Мнёв, born 1957) is a Russian mathematician at the Steklov Institute's St. Petersburg branch, known for the universality theorem and winning the Fulkerson Prize.
Nikolai P. Lavyorov
Nikolai P. Lavyorov (Николай Павлович Лавёров) was a Soviet and Russian geologist who founded uranium deposit research and served as vice president of the Academy of Sciences for 25 years.
Nikolai Sobolev (Николай Владимирович Соболев)
Nikolai Sobolev (Николай Владимирович Соболев) was a Russian mineralogist and petrologist in Novosibirsk, an Academician best known for proving diamond inclusions are syngenetic and opening ultrahigh-pressure metamorphic diamond study.
Nikolaos V. Sahinidis (Νικόλαος Β. Σαχινίδης)
Nikolaos V. Sahinidis (Νικόλαος Β. Σαχινίδης) is a Greek-American chemical engineer and optimization scientist at Georgia Tech, known for the BARON global optimization solver and ALAMO.
Nikolay Belov (geochemist)
Nikolay Vasilyevich Belov (Николай Васильевич Белов; 1891–1982) was a Soviet crystallographer and geochemist who founded the Soviet school of structural crystallography and determined the structures of more than 500 compounds.
Nikolay Chentsov
Nikolay Chentsov, also Nikolay Nikolaevich Chentsov (1930 to 1992), was a Russian mathematician who proved that the Fisher metric is the unique Markov-invariant metric on a probability simplex.
Nikolay Chetaev
Nikolay Chetaev (Николай Гурьевич Четаев, 1902–1959) was a Soviet mathematician and mechanician known for Chetaev's instability theorem and for founding the Kazan school of stability theory.
Nikolay Kornienko
Nikolay Kornienko is a chemist working on renewable-energy electrocatalysis and semi-artificial photosynthesis, a Full Professor at the University of Bonn since 2023 who won the 2025 EuChemS Lecture Award.
Nikolay Krylov (mathematician)
Nikolai Vladimirovich Krylov (Николай Владимирович Крылов) is a mathematician at the University of Minnesota known for the Krylov–Safonov estimates and the theory of controlled diffusion processes.
Nikolay P. Laverov
Nikolay Pavlovich Laverov (1930–2016) was a Russian geologist who served as vice president of the Russian Academy of Sciences from 1988 to 2013 and pioneered uranium geology.
Nikolay Semenov
Nikolay Nikolaevich Semenov (Николай Семёнов, 1896–1986) was a Soviet physical chemist who discovered branched chain reactions, founded the Institute of Chemical Physics, and won the 1956 Nobel Prize in Chemistry.
Nikolay Sergeyevich Krylov
Nikolay Sergeyevich Krylov (1917–1947) was a Russian theoretical physicist who showed that mixing is a sufficient condition for relaxation to equilibrium; his posthumous 1950 book anticipated dynamical chaos.
Nikolay Sobolev
Nikolay Vladimirovich Sobolev (Соболев Николай Владимирович; 1935–2022) was a Soviet and Russian mineralogist and petrologist in Novosibirsk known for work on diamonds, kimberlites, and ultrahigh-pressure metamorphism.
Nikolay V. Vitanov
Nikolay V. Vitanov is a Bulgarian theoretical physicist and full professor of theoretical physics at Sofia University, known for composite pulses and composite STIRAP, robust techniques for high-fidelity quantum control.
Nikolay Zheludev
Nikolay I. Zheludev, born 1955, is a physicist known as a founding member of nanophotonics and metamaterials, deputy director at Southampton's Zepler Institute and a Fellow of the Royal Society.
Nikoloz Muskhelishvili
Nikoloz (Niko) Ivanovich Muskhelishvili (1891–1976) was a Georgian mathematician who built the theory of singular integral equations and complex-potential methods for plane elasticity, a turning point in elasticity theory.
Nikon D90
The Nikon D90 is a 12.3-megapixel DX-format digital SLR announced by Nikon in 2008, billed as the first digital SLR with a movie mode, recording 720p video.
Nikon F-mount
The Nikon F-mount is the bayonet lens mount Nikon introduced in 1959 on its Nikon F, its first SLR, and has kept unchanged ever since.
Nikos Hadjichristidis
Nikos Hadjichristidis is a Greek polymer chemist, a distinguished professor at KAUST in Saudi Arabia since 2011, known for building star, comb, and cyclic polymers by anionic polymerization.
Nile
The Nile, also known as the River Nile, is the longest river in the world, flowing 6,695 km northward through eleven countries in eastern Africa to drain into the Mediterranean Sea.
NileRed
NileRed is the YouTube channel of Nigel Braun, a Canadian chemist known for hour-long videos documenting multi-step chemical synthesis in his Montreal laboratory, with over 7.6 million subscribers.
Nilokeras Fossa
Nilokeras Fossa is an IAU-approved fossa (trough system) on Mars at 24.74°N, 302.20°E, about 265-267 km across, approved in 1988 and named from a classical albedo feature.
Nilpotent element
A nilpotent element of a ring is an element x whose some power x raised to n equals 0, making every nilpotent a zero divisor though not conversely, as with 2 in the integers mod 6.
Nilpotent group
A nilpotent group is a group whose lower central series, built by repeatedly taking commutators, reaches the trivial subgroup after finitely many steps; class 1 groups are exactly abelian.
Nilpotent Lie algebra
A nilpotent Lie algebra is a Lie algebra in which all iterated brackets of sufficient length equal zero, so it is nearly abelian and underlies nilpotent Lie groups.
Nilpotent matrix
A nilpotent matrix, or nilpotent transformation, is a square matrix for which some finite power is the zero matrix, and 0 is its only eigenvalue.
Nilradical
The nilradical of a commutative ring is the ideal of all nilpotent elements, also equal to the intersection of all prime ideals of the ring.
Nils Christoffer Dunér
Nils Christoffer Dunér (1839–1914) was a Swedish astronomer who introduced astrophysics to Sweden and, as Uppsala's professor of astronomy, spectroscopically measured the Sun's differential rotation to near its poles.