All articles starting with N
16,460 articles
Numerical manifold method
The numerical manifold method (NMM), proposed by Gen-hua Shi in 1991, is a numerical technique for computing the deformation of solids containing cracks, joints, and block boundaries.
Numerical methods for ordinary differential equations
Numerical methods for ordinary differential equations, also called numerical solutions of ordinary differential equations, are algorithms that approximate solutions step by step, judged by accuracy, stability, and cost.
Numerical methods for partial differential equations
Numerical methods for partial differential equations replace PDEs, rarely solvable in closed form, with finite algebraic systems, chiefly finite difference, finite element, finite volume, and spectral methods.
Numerical methods in numerical relativity
The numerical methods in numerical relativity solve Einstein's equations on computers using high-order finite differences and spectral methods, plus adaptive mesh refinement, to simulate merging black holes.
Numerical model of the Solar System
A numerical model of the Solar System is a computer integration of the gravitational equations of motion for the Sun, planets, and other bodies, used to produce ephemerides for spacecraft navigation.
Numerical relativity
Numerical relativity is the branch of computational physics that numerically solves Einstein's field equations for spacetimes too complex for exact solutions, such as black hole and neutron star mergers.
Numerical solution of decay networks
Numerical solution of decay networks covers the computational methods for stiff coupled decay equations, including CRAM, matrix exponentials, implicit solvers, and depletion codes like ORIGEN.
Numerical stability
Numerical stability is the property of an algorithm whose rounding errors and small input perturbations do not grow unboundedly, central to scientific computing and numerical linear algebra.
Numerical taxonomy
Numerical taxonomy is a method in biological systematics that classifies organisms by computer analysis of many equally weighted characters, producing groups based on overall similarity.
Numerical weather prediction
Numerical weather prediction, also called numerical weather forecasting, is a method in which computers solve the equations governing the atmosphere to predict future weather from current observations.
Número (magazine)
Número was a Uruguayan literary magazine of poetry and criticism published in Montevideo from 1949 to 1964, founded by Idea Vilariño, Manuel Claps, and Emir Rodríguez Monegal.
Numero sign
Numero sign (№, U+2116 NUMERO SIGN) is a typographic abbreviation of "number" used before a numeral, encoded in the Letterlike Symbols block for Cyrillic and Asian standards; distinct from #, Nº, and N+degree sign.
Numero Uno
Numero Uno is an Italian record label founded in 1969 by Mogol, his father Mariano Rapetti, and Alessandro Colombini, best known for Lucio Battisti's albums.
Numero Verde
Numero Verde, Italian for "green number," is Italy's toll-free telephone service with nine-digit 800 numbers that are free to call, regulated by AGCOM and paid entirely by the called party.
Numerology
Numerology, also called arithmancy or number symbolism, is the practice of assigning symbolic or divinatory meaning to numbers, including character readings from a person's name and birth date.
Numerov (lunar crater)
Numerov, a large IAU-named lunar impact crater on the far side's southern hemisphere, 105.39 km across at 70.5°S 162.2°W, named for Soviet astronomer Boris Numerov, approved 1970.
Numerus Syrorum
Numerus Syrorum: Roman fortified town at modern Maghnia (Lalla Marnia), Algeria, westernmost outpost of Mauretania Caesariensis, garrisoned from the Severan era by a numerus of Syrian archers transferred from Dacia; attested by 217/218 milestones and tombstones to the fifth century.
NumFOCUS
NumFOCUS is an American 501(c)(3) nonprofit founded in 2012 in Austin, Texas, serving as the legal home of open source projects including NumPy, pandas, and Project Jupyter.
NuMI
NuMI (Neutrinos at the Main Injector) is a high-intensity muon neutrino beamline at Fermilab in Batavia, Illinois, completed in 2005, serving the MINOS, MINERvA, and NOvA experiments.
Numi-Torum (crater on Callisto)
Numi-Torum is a 75.60 km wide impact crater on Callisto, Jupiter's second-largest moon, named in 1997 for the Mansi creator god of Siberia and centered in its southern hemisphere.
Numida
Numida, guineafowl genus erected by Linnaeus in 1764, family Numididae, order Galliformes; monotypic for the helmeted guineafowl Numida meleagris, an African bird domesticated about 2,000 years ago in Mali and Sudan.
Numidia
Numidia, also known as the Numidian Kingdom, was an ancient kingdom in North Africa, unified under King Massinissa around 202 BCE and closely allied with Rome.
Numidian cavalry
Numidian cavalry was the light cavalry of the Numidian kingdoms of North Africa in the 3rd and 2nd centuries BC, mounted on small horses and armed with javelins.
Numidian coinage
Numidian coinage is the money struck by the kings of Numidia in present-day Algeria from the late 3rd to the mid-1st century BC, beginning with Syphax and Masinissa.
Numidian language
The Numidian language, also called Old Libyan or Libyan, is the ancient Berber language of North Africa, known from over 1,500 inscriptions dating from the first millennium BC.
Numidians
The Numidians were the Berber people of the North African kingdoms of the Massylii and Masaesyli, which united into Numidia around 202 BCE, famed for their light cavalry.
Numinous
The numinous is Rudolf Otto's term, from Latin numen, for the experience of a divine presence, introduced in Das Heilige (1917) as the non-rational, mysterium tremendum et fascinans core of the holy underlying all religion.
Numismatics
Numismatics is the study and collection of coins, paper money, tokens, and medals, combining historical and economic analysis with authentication, grading, and valuation; the global coin-collecting market was valued at $18.1 billion in 2024.
NUMMI
NUMMI (New United Motor Manufacturing) was a General Motors and Toyota joint venture that assembled cars in Fremont, California, from 1984 to 2010, producing 7.74 million vehicles.
Nummular dermatitis
Nummular dermatitis (nummular eczema, discoid eczema): chronic itchy coin-shaped eczematous plaques on the limbs of middle-aged and older adults; clinical diagnosis, topical corticosteroids first-line, no FDA-approved therapies.