42,772 articles
Hermann Nicolai
Hermann Nicolai, born 1952, is a German theoretical physicist known for maximal supergravity and the hidden symmetry E10, and director emeritus at the Albert Einstein Institute in Potsdam.
Hermann Oberth
Hermann Oberth was a physicist and rocketry pioneer whose 1923 book Die Rakete zu den Planetenräumen founded astronautics; he later worked with Wernher von Braun.
Hermann Schwarz
Hermann Amandus Schwarz (1843–1921) was a German mathematician known for the Cauchy–Schwarz inequality, the Schwarz lemma, and the first rigorous proof of the Riemann mapping theorem.
Hermann Staudinger
Hermann Staudinger was a German chemist who founded macromolecular chemistry, proposing in 1920 that polymers are giant covalently bonded molecules, and won the 1953 Nobel Prize in Chemistry.
Hermann Struve
Hermann Struve, also known as Karl Hermann Struve, was a Russian-born astronomer of the Struve dynasty who directed the Berlin-Babelsberg Observatory and transformed the study of Saturn's satellites and rings.
Hermann Träuble
Hermann Träuble (1932–1976) was a German physicist at the Max Planck Institute for Metals Research who, with Uwe Essmann, first photographed the Abrikosov vortex lattice in 1967.
Hermann Vermeil
Hermann Vermeil (1889–1959) was a German mathematician who, as Hermann Weyl's assistant, gave the first published proof in 1917 that scalar curvature is the only absolute invariant of its type in Riemannian geometry.
Hermann von Helmholtz
Hermann von Helmholtz (Hermann Ludwig Ferdinand von Helmholtz, 1821–1894) was a German physician, physiologist, and physicist who formulated the conservation of energy, invented the ophthalmoscope, and founded the mathematical theory of vortex motion.
Hermann Weyl
Hermann Weyl (1885–1955) was a German-born mathematician and mathematical physicist, Hilbert's student at Göttingen, whose 1918 gauge idea underlies the standard model of particle physics.
Hermenegildo García
Hermenegildo García, born 1957, is a Spanish chemist and Full Professor at the Universitat Politècnica de València whose photocatalysis research converts solar energy into green hydrogen and renewable fuels.
Hermeneutic phenomenology
Hermeneutic phenomenology, also called interpretive or existential phenomenology, is a qualitative research methodology that interprets lived experience by combining phenomenological description with hermeneutic interpretation of interview texts, producing provisional written interpretations rather than generalizable findings.
Hermetic seal
A hermetic seal is a gas-tight joint or closure defined by a measured leak rate, used to protect electronics and containers from moisture and contaminants.
Hermite distribution
The Hermite distribution is a two-parameter discrete probability distribution for overdispersed or multimodal count data, introduced by C. D. Kemp and Adrienne W. Kemp in 1965.
Hermite interpolation
Hermite interpolation is a polynomial interpolation method matching function values and derivatives at nodes; matching values and first derivatives at n nodes gives a unique polynomial of degree at most 2n − 1.
Hermite normal form
The Hermite normal form (HNF) is a unique canonical echelon-like form of an integer matrix, reached by multiplying by a matrix of determinant ±1 while preserving the generated lattice.
Hermite polynomials
Hermite polynomials, also called the probabilists' Hermite polynomials in one of two conventions, are classical orthogonal polynomials on the real line with a Gaussian weight, central to the quantum harmonic oscillator.
Hermitian adjoint
The Hermitian adjoint, also called the Hermitian conjugate, is the unique operator A† with ⟨Au, v⟩ = ⟨u, A†v⟩, generalizing the conjugate transpose of a matrix.
Hermitian matrix
A Hermitian matrix, also called a self-adjoint matrix, is a complex square matrix that equals its own conjugate transpose; its eigenvalues are always real, and it is unitarily diagonalizable.
Hermitian metric
A Hermitian metric is a smoothly varying, positive-definite Hermitian inner product on the holomorphic tangent bundle of a complex manifold, the analog of a Riemannian metric.
Hernan Makse
Hernán A. Makse is a statistical physicist, Distinguished Professor at the City College of New York, known for his 2008 Nature phase diagram of jammed matter.
Hernán Míguez
Hernán Míguez, born in Buenos Aires in 1971, is a CSIC research professor in Seville who works on photonic crystals and optical materials for solar energy.
Hero of Alexandria (ρων)
Hero of Alexandria (Ἥρων), also called Heron, was a Greek mathematician and engineer in Roman-era Alexandria around the 1st century CE, known for the aeolipile and Hero's formula.
Heron's formula
Heron's formula, also called Hero's formula, gives the area of a triangle from its three side lengths alone, without heights or angles, in Heron's Metrica of about AD 60.
Herre van der Zant
Herre van der Zant (born 1963) is a Dutch experimental physicist and full professor at Delft University of Technology, working on molecular electronics and nanomechanics of atomically thin materials.
Herrick L. Johnston
Herrick L. Johnston, born Herrick Lee Johnston (1898–1965), was an American chemist who co-discovered the heavy oxygen isotopes oxygen-17 and oxygen-18 in 1929 with William F. Giauque.
Herringbone pattern
The herringbone pattern is a zigzag arrangement of rectangular pieces, such as tiles or bricks, laid at right angles with their ends meeting the sides of the next.
Herschel Rabitz
Herschel Rabitz is a chemical physicist at Princeton University, a professor of chemistry since 1971, known for inventing the learning-algorithm approach to coherent control of quantum phenomena.
Herschel-Bulkley fluid
A Herschel-Bulkley fluid is a fluid that combines a yield stress with power-law viscous flow, a model introduced by Herschel and Bulkley in 1926 and applied to drilling muds, concrete, and foods.
Herse
Herse (Jupiter L, S/2003 J 17) is a small retrograde irregular moon of Jupiter in the Carme group, discovered February 27, 2003 by Gladman, Kavelaars, Petit, and Allen; mean radius about 1 km, orbital period over 734 days.
Hertha Wambacher
Hertha Wambacher (1903–1950) was an Austrian physicist at the Vienna Radium Institute who, as Marietta Blau's collaborator, co-discovered cosmic-ray disintegration stars in 1937 and shared the 1937 Lieben Prize.