All articles starting with L
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Lambda Andromedae
Lambda Andromedae is a chromospherically active giant star in the constellation Andromeda, an RS Canum Venaticorum variable with a rotation period of about 54 days.
Lambda architecture
Lambda architecture is a data-processing architecture, originated by Nathan Marz, that runs batch and streaming pipelines side by side and merges their results at query time.
Lambda Aurigae
Lambda Aurigae (λ Aurigae, λ Aur) is a Sun-like star in the constellation Auriga, about 41 light-years away, known as a nearby solar analog used to calibrate radial-velocity instruments.
Lambda calculus
The lambda calculus, also written λ-calculus, is a formal system invented by Alonzo Church in the 1930s that expresses computation through function definition and application, computing exactly what Turing machines compute.
Lambda Cephei
Lambda Cephei, abbreviated λ Cep and cataloged as HD 210839, is a hot, luminous O-type supergiant star in Cepheus and one of the brightest runaway O stars.
Lambda Chi Alpha
Lambda Chi Alpha (ΛΧΑ), founded 1909 at Boston University by Warren A. Cole, is an international social college fraternity with about 185 chapters and 300,000 members, known for abolishing pledging in 1972 and for its Theta Kappa Nu merger.
Lambda cube
The lambda cube is Henk Barendregt's arrangement of eight typed lambda calculi, formed from the simply typed lambda calculus by adding polymorphism, type operators, and dependent types.
Lambda cyhalothrin
Lambda cyhalothrin (λ-cyhalothrin, CAS 91465-08-6) is a synthetic pyrethroid insecticide and acaricide, an enriched isomer of cyhalothrin, sold as Karate, Matador, and Demand; highly toxic to bees and aquatic life, with soil half-life 4-12 weeks and EFSA ADI 0.0025 mg/kg bw.
Lambda lifting
Lambda lifting (λ-lifting) is a program transformation used in compiling functional languages: local functions move to the top level and their free variables become extra parameters.
Lambda Literary Awards
Lambda Literary Awards (Lammys): annual US awards for LGBTQ+ literature, founded 1989 by Lambda Rising bookstore's Deacon Maccubbin, now 26 categories judged by panels, ceremony in New York City.
Lambda Orionis
Lambda Orionis, also known as Meissa, is a massive triple star system about 1,500 light years away that marks the head of Orion and dominates the Lambda Orionis star-forming region.
Lambda phage
Lambda phage (Enterobacteria virus Lambda) is a temperate bacteriophage of Escherichia coli with a 48,502 bp DNA genome that either lyses the host or lies dormant as a prophage.
Lambda point
The lambda point is the temperature, about 2.1768 K, at which liquid helium-4 transitions into the superfluid phase helium II; it is named for the lambda-shaped peak in the heat capacity curve.
Lambda Scorpii
Lambda Scorpii (λ Scorpii), also known as Shaula, is a bright, naked-eye star at the tip of the Scorpion's tail in Scorpius, actually a triple system.
Lambda Serpentis
Lambda Serpentis is a G-type main-sequence star of apparent magnitude 4.42 in Serpens Caput, about 39.5 light-years from Earth, hosting a hot Neptune in a 15.5-day orbit.
Lambda Velorum
Lambda Velorum (λ Velorum), officially named Suhail after its traditional Arabic name, is a magnitude 2.2 orange supergiant in the southern constellation Vela, about 545 light-years from Earth.
Lambda wing
A lambda wing, also written λ wing, is an aircraft wing planform whose trailing edge combines forward and backward sweep, forming a Λ outline with higher lift-to-drag ratio.
Lambda-4S
Lambda-4S (L-4S) was a four-stage, all-solid-propellant Japanese rocket that launched Ohsumi, Japan's first satellite, from Kagoshima on 11 February 1970, succeeding on its fifth attempt.
Lambda-CDM model (ΛCDM)
Lambda-CDM, or ΛCDM, is the standard six-parameter model of cosmology, describing a flat 13.8-billion-year-old universe of cold dark matter and dark energy, though it faces tensions in measurements of the Hubble constant.
Lambdavirus
Lambdavirus, formerly Lambdalikevirus, is a genus of head-tailed bacterial viruses named for phage lambda, the temperate E. coli virus whose lysis-lysogeny switch became a model of gene regulation.
Lambeau Field
Lambeau Field, Green Bay Packers home stadium since 1957, opened as Green Bay City Stadium, renamed 1965 for Curly Lambeau; capacity 81,041, heated natural grass, Frozen Tundra, NFL's longest-tenured venue.
Lambek calculus
The Lambek calculus, or syntactic calculus, is a substructural logic introduced by Joachim Lambek in 1958, in which grammatical well-formedness is decided by logical derivability over syntactic types.
Lambert (Martian crater)
Lambert is a 92-km-diameter impact crater on Mars, IAU-approved as Gazetteer feature 3254, centered at 19.98°S, 25.30°E (334.70°W) in the planet's southern hemisphere.
Lambert B. Freund
Lambert B. Freund, also known as Lambert Ben Freund, was an American engineer and solid mechanician at Brown University, elected to the National Academy of Sciences and Engineering.
Lambert Ben Freund
Lambert Ben Freund (1942–2024) was an American solid mechanician at Brown University, known for dynamic fracture mechanics and thin-film mechanics, and a member of both national academies.
Lambert Simnel
Lambert Simnel (c. 1475–1525), Yorkist pretender to the English throne, impersonated Edward, Earl of Warwick, was crowned "Edward VI" in Dublin in 1487, defeated at the Battle of Stoke, and pardoned by Henry VII.
Lambert W function
The Lambert W function, also called the omega function, is the multivalued inverse of w e^w, with infinitely many branches, two of which take real values.
Lambert Wilson
Lambert Wilson, French actor and singer born 1958 in Neuilly-sur-Seine, son of Georges Wilson; Merovingian in the Matrix films, Brother Christian in Of Gods and Men, Abbé Pierre, Cousteau, and de Gaulle, Prix Jean Gabin winner and Cannes master of ceremonies 2014.
Lambert–Eaton myasthenic syndrome
Lambert–Eaton myasthenic syndrome (LEMS), also called Eaton-Lambert syndrome, is a rare autoimmune presynaptic neuromuscular junction disorder caused by P/Q-type VGCC antibodies, paraneoplastic in 50-60% of cases with small-cell lung cancer, treated with amifampridine, IVIg, and tumor therapy.
Lambert's problem
Lambert's problem is the orbital mechanics problem of finding the Keplerian transfer orbit between two positions given the time of flight, posed by Johann Heinrich Lambert in 1761 and used in mission planning and orbit determination.