Physical world and mathematics

Norman Kroll

Norman Kroll (1922–2004) was an American theoretical physicist and pioneer of quantum electrodynamics who made the first correct calculation of the Lamb shift and taught at UC San Diego.

Norman L. Biggs

Norman L. Biggs (born 1941) is a British mathematician, professor at the London School of Economics, known for algebraic combinatorics and the critical group of graphs.

Norman L. Bowen (1887–1956) was a Canadian experimental petrologist whose 1922 reaction series showed that many igneous rocks crystallize from one parent magma; his 1928 book established physical chemistry as petrology's basis.

Norman L. Gilbreath

Norman L. Gilbreath is an American mathematician and magician who published the Gilbreath principle in card magic and Gilbreath's conjecture on primes, both in 1958.

Norman Levinson

Norman Levinson (1912–1975) was an American mathematician at MIT, an Institute Professor known for the Coddington–Levinson text, Levinson's theorem, and proving a third of Riemann zeta zeros lie on the critical line.

Norman Lockyer

Norman Lockyer, full name Joseph Norman Lockyer, was an English astronomer who proposed helium from the solar spectrum and founded the journal Nature in 1869.

Norman Macleod Ferrers

Norman Macleod Ferrers (1829–1903) was a British mathematician, Senior Wrangler at Cambridge, Master of Gonville and Caius College, and Vice-Chancellor, known for the Ferrers diagram in partition theory.

Norman Margolus

Norman Margolus is a physicist and computer scientist at MIT, best known for the Margolus–Levitin theorem bounding computation speed and for building cellular automata machines.

Norman Murray

Norman Murray is a Canadian-based theoretical astrophysicist at the Canadian Institute for Theoretical Astrophysics in Toronto, known for work on disk winds, planetary migration, and star formation.

Norman Routledge

Norman Arthur Routledge (1928–2013) was an English mathematician and schoolteacher who taught at Eton College, was a fellow of King's College, Cambridge, and preserved Alan Turing's letters.

Norman Sleep

Norman Sleep, born 1945, is an American geophysicist and emeritus professor at Stanford University, elected to the National Academy of Sciences in 1999, known for mantle convection and planetary thermal evolution.

Norman Steenrod

Norman Steenrod (1910–1971) was an American algebraic topologist and Princeton professor who founded homological algebra and gave his name to the Steenrod squares, the Steenrod algebra, and the Eilenberg–Steenrod axioms.

Norman Sutin

Norman Sutin (1928–2022) was a chemist who spent his career at Brookhaven National Laboratory, known for the theory and measurement of electron-transfer reactions and for early work on artificial photosynthesis.

Norman Yao

Norman Yao is an American condensed matter physicist and Harvard professor known for theoretical work on non-equilibrium quantum matter, most famously discrete time crystals, recognized by the 2022 New Horizons in Physics Prize.

Normand Voyer

Normand Voyer is a Canadian chemist and full professor at Université Laval in Quebec City, known for artificial ion channels, antimicrobial peptides, and northern natural products.

Normed algebra

A normed algebra is an associative algebra equipped with a submultiplicative norm, meaning |ab| ≤ |a|·|b|; when the norm is complete it is called a Banach algebra.

Normed vector space

A normed vector space, or normed linear space, is a vector space over the real or complex numbers equipped with a norm assigning each vector a nonnegative length.

Norris Bradbury

Norris Bradbury (Norris Edwin Bradbury, 1909–1997) was an American physicist who directed the Los Alamos Laboratory from 1945 to 1970, succeeding J. Robert Oppenheimer and leading its postwar transformation.

Oct 22, 2026

Norrish reaction

The Norrish reaction is a light-induced photochemical transformation of aldehydes and ketones, documented by Ronald Norrish in the 1930s, with type I and type II pathways.

North

North is one of the four cardinal directions: true north toward the geographic North Pole, magnetic north where a compass points, and grid north on maps.

North American blizzard of 1996

The North American blizzard of 1996, commonly called the Blizzard of '96, was a severe nor'easter that struck the eastern United States from January 6 to 8, 1996.

North American Industry Classification System

The North American Industry Classification System (NAICS) is the standard used by the statistical agencies of the United States, Canada, and Mexico to classify business establishments for economic statistics.

North American Mesoscale Model

The North American Mesoscale Model (NAM) is a regional numerical weather prediction system run by NCEP four times daily, providing mesoscale forecast guidance to meteorologists across North America.

North American monsoon

The North American monsoon is a seasonal shift in winds that brings summer rain to northern Mexico and the southwestern US, peaking in July and August.

North American Nanohertz Observatory for Gravitational Waves

The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) is a US and Canadian collaboration, founded in 2007, that uses millisecond pulsar timing to detect gravitational waves, reporting evidence for a background in 2023.

North American Plate

The North American Plate is a major tectonic plate covering most of North America, Greenland, and Atlantic floor, bounded by the San Andreas Fault and Cascadia subduction zone.

North Anatolian Fault

The North Anatolian Fault (NAF) is a major right-lateral strike-slip fault in northern Turkey, about 1,200 km long, marking the boundary between the Anatolian and Eurasian plates.

North Atlantic Current

The North Atlantic Current, also called the North Atlantic Drift, is a warm ocean current that continues the Gulf Stream northeastward from the Grand Banks toward the British Isles.

North Atlantic Deep Water

North Atlantic Deep Water is a cold, salty water mass formed in the subpolar North Atlantic and Nordic Seas that flows southward and ventilates the deep ocean.