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HAT P-4

  • HAT-P-4
  • Wide binary star system in the constellation Boötes

    HAT-P-4 is a wide binary star consisting of a pair of G-type main-sequence stars in the constellation of Boötes. It also has the BD designation BD+36°2593

    HAT-P-4

    HAT-P-4

  • HAT-P-67b
  • Gas giant exoplanet orbiting HAT-P-67

    HAT-P-67b is an exoplanet orbiting around the star HAT-P-67. A gas giant on a close orbit, it is a hot Jupiter with one of the largest sizes and lowest

    HAT-P-67b

    HAT-P-67b

  • HAT-P-13
  • G-type main sequence star in the constellation Ursa Major

    HAT-P-13, also known as GSC 03416-00543, is a G-type subgiant approximately 800 light-years away in the constellation Ursa Major. In 2009 it was discovered

    HAT-P-13

    HAT-P-13

  • HAT-P-7b
  • Super Jupiter orbiting HAT-P-7

    HAT-P-7b (or Kepler-2b) is an extrasolar planet discovered in 2008. It orbits very close to its host star and is larger than Jupiter. Due to the extreme

    HAT-P-7b

    HAT-P-7b

    HAT-P-7b

  • HAT-P-4b
  • Exoplanet in the constellation Boötes

    HAT-P-4b is a confirmed extrasolar planet orbiting the star HAT-P-4 over 1000 light years away in Boötes constellation. It was discovered by transit on

    HAT-P-4b

    HAT-P-4b

    HAT-P-4b

  • HAT-P-11b
  • Super Neptune orbiting HAT-P-11

    HAT-P-11b (or Kepler-3b) is an extrasolar planet orbiting the star HAT-P-11. It was discovered by the HATNet Project team in 2009 using the transit method

    HAT-P-11b

    HAT-P-11b

    HAT-P-11b

  • HAT-P-67
  • Binary star system

    There is one known planet orbiting HAT-P-67A. HAT-P-67b is a gas giant planet transiting its parent star every 4.8 days, at an orbital distance of 0

    HAT-P-67

    HAT-P-67

  • HAT-P-27
  • Star in the constellation Virgo

    main-sequence star. The star's age is similar to the Sun's at 4.4 billion years. HAT-P-27 is enriched in heavy elements, having a 195% concentration of

    HAT-P-27

    HAT-P-27

  • HAT-P-1b
  • Hot Jupiter orbiting HAT-P-1

    HAT-P-1b is an extrasolar planet orbiting the Sun-like star HAT-P-1, also known as ADS 16402 B. HAT-P-1 is the dimmer component of the ADS 16402 binary

    HAT-P-1b

    HAT-P-1b

    HAT-P-1b

  • HAT-P-6
  • Star in the constellation Andromeda

    HAT-P-6, also named Sterrennacht is a star in the constellation Andromeda, located approximately 895 light years or 274 parsecs away from the Earth. It

    HAT-P-6

    HAT-P-6

  • HAT-P-14b
  • Exoplanet in the constellation of Hercules

    HAT-P-14b, officially named Sissi and also known as WASP-27b, is an extrasolar planet located approximately 224.2 ± 0.6 parsecs (731.2 ± 2.0 ly) away

    HAT-P-14b

    HAT-P-14b

    HAT-P-14b

  • HAT-P-2b
  • Extrasolar planet

    HAT-P-2b is an extrasolar planet detected by the HATNet Project in May 2007. It orbits a class F star HAT-P-2, (bigger and hotter than the Sun), located

    HAT-P-2b

    HAT-P-2b

    HAT-P-2b

  • HAT-P-12
  • K-type main sequence star in constellation Canes Venatici

    HAT-P-12, also named Komondor, is a magnitude 13 low-metallicity K dwarf star approximately 463 light years away in the constellation Canes Venatici,

    HAT-P-12

    HAT-P-12

  • HAT-P-32b
  • Extrasolar planet in the Andromeda constellation

    HAT-P-32b is a planet orbiting the G-type or F-type star HAT-P-32, which is approximately 950 light years away from Earth. HAT-P-32b was first recognized

    HAT-P-32b

    HAT-P-32b

  • HAT-P-23
  • Star in the constellation Delphinus

    HAT-P-23 is a G-type main-sequence star 1192 light-years away. It has a rapid rotation (rotation period equal to 7 days) for its advanced age of 4 billion

    HAT-P-23

    HAT-P-23

  • Boötes
  • Constellation in the northern celestial hemisphere

    HAT-P-4b is also a hot Jupiter. It is noted for orbiting a particularly metal-rich host star and being of low density. Discovered in 2007, HAT-P-4 b

    Boötes

    Boötes

    Boötes

  • HAT-P-13b
  • Hot Jupiter orbiting HAT-P-13

    HAT-P-13b is an extrasolar planet approximately 700 light-years away in the constellation Ursa Major. The planet was discovered when it transited across

    HAT-P-13b

    HAT-P-13b

    HAT-P-13b

  • HAT-P-5
  • G-type star

    was reported as 0.66 ± 0.11 g/cm3, and its inclination 86.75 ± 0.44°. HAT-P-4 HAT-P-6 List of extrasolar planets Roman, Nancy G. (1987). "Identification

    HAT-P-5

    HAT-P-5

  • HAT-P-36
  • Star in constellation Canes Venatici

    HAT-P-36, also referred to as Tuiren is a 12th magnitude G-type main-sequence star estimated to be approximately 958 light-years away from Earth in the

    HAT-P-36

    HAT-P-36

    HAT-P-36

  • HAT-P-7
  • Star system in Cygnus

    HAT-P-7 is a triple star system located about 1,088 light-years away in the constellation Cygnus. The apparent magnitude of this star is 10.5, which means

    HAT-P-7

    HAT-P-7

  • HAT-P-38b
  • Transiting exoplanet in Triangulum

    HAT-P-38b, formally named Hiisi, is a transiting exoplanet orbiting the G-type star HAT-P-38 821 light-years from the Solar System in the constellation

    HAT-P-38b

    HAT-P-38b

    HAT-P-38b

  • HAT-P-21
  • Star in the constellation Ursa Major

    HAT-P-21, also named Mazaalai, is a G-type main-sequence star about 927 light-years away. The star has amount of metals similar to solar abundance. The

    HAT-P-21

    HAT-P-21

  • HAT-P-12b
  • Extrasolar planet in constellation Canes Venatici

    HAT-P-12b, formally named Puli, is an extrasolar planet approximately 468 light years away from Earth, orbiting the 13th magnitude K-type star HAT-P-12

    HAT-P-12b

    HAT-P-12b

    HAT-P-12b

  • HAT-P-17
  • K-type main sequence star in the constellation Cygnus

    HAT-P-17 is a K-type main-sequence star about 92.4 parsecs (301 ly) away. It has a mass of about 0.857 ± 0.039 M☉. It is the host of two planets, HAT-P-17b

    HAT-P-17

    HAT-P-17

  • HAT-P-33b
  • Extrasolar planet

    HAT-P-33b is a planet in the orbit of HAT-P-33, which lies 1,310 light-years away from Earth. Its discovery was reported in June 2011, although it was

    HAT-P-33b

    HAT-P-33b

  • HAT-P-3
  • Star in the constellation Ursa Major

    HAT-P-3, is a metal-rich K5 dwarf star located about 441 light-years away in the constellation Ursa Major. At a magnitude of about 11.5 it is not visible

    HAT-P-3

    HAT-P-3

  • HAT-P-11
  • Planet-hosting star in the constellation Cygnus

    HAT-P-11, also designated GSC 03561-02092 and Kepler-3, is a metal-rich orange dwarf star with a planetary system, 123 light-years (38 parsecs) away in

    HAT-P-11

    HAT-P-11

  • HAT-P-15
  • Star in the constellation Perseus

    HAT-P-15 is a G-type main-sequence star about 630 light-years away. The star is older than Sun yet has a concentration of heavy elements roughly 190%

    HAT-P-15

    HAT-P-15

  • HAT-P-9
  • F-type star in the constellation Auriga

    HAT-P-9 is a magnitude 12 F-type star approximately 1500 light-years away in the constellation Auriga. A search for a binary companion star using adaptive

    HAT-P-9

    HAT-P-9

    HAT-P-9

  • HAT-P-18
  • Star in the constellation Hercules

    HAT-P-18 is a K-type main-sequence star about 530 light-years away. The star is very old and has a concentration of heavy elements similar to solar abundance

    HAT-P-18

    HAT-P-18

  • Hat
  • Shaped head covering

    A hat is a head covering which is worn for various reasons, including protection against weather conditions, ceremonial reasons such as university graduation

    Hat

    Hat

    Hat

  • HAT-P-38
  • Star in the constellation Traingulum

    HAT-P-38, formally named Horna, is a star located in the northern constellation Triangulum. It has an apparent magnitude of 12.51, making it readily visible

    HAT-P-38

    HAT-P-38

  • HAT-P-16
  • F-type main sequence star in the constellation Andromeda

    HAT-P-16 is a F-type main-sequence star about 725 light-years away. The star has a concentration of heavy elements slightly higher than solar abundance

    HAT-P-16

    HAT-P-16

  • HAT-P-30
  • G-type main-sequence star

    HAT-P-30, also known as WASP-51, is the primary of a binary star system about 679 light-years away in the constellation Hydra. It is a G-type main-sequence

    HAT-P-30

    HAT-P-30

  • HAT-P-29
  • Star in the constellation Perseus

    HAT-P-29, also known as Muspelheim since 2019 (as part of the IAU's NameExoWorlds project), is a star about 1,040 light-years (320 parsecs) away. It is

    HAT-P-29

    HAT-P-29

  • Red Hat
  • American open source software company

    Red Hat, LLC (formerly Red Hat Software, Inc. and then Red Hat, Inc.) is an American software company that provides open source software products to enterprises

    Red Hat

    Red Hat

    Red_Hat

  • HAT-P-41
  • Star in the constellation Aquila

    HAT-P-41 is a binary star system. Its primary is a F-type main-sequence star. Its surface temperature is 6390±100 K. compared to the Sun, HAT-P-41 is

    HAT-P-41

    HAT-P-41

  • Boonie hat
  • Wide-brim hat commonly used by military forces in hot tropical climates

    boonie hat or booney hat is a type of wide-brim sun hat commonly used by military forces in hot tropical climates. Its design is similar to a bucket hat but

    Boonie hat

    Boonie hat

    Boonie_hat

  • HAT-P-26
  • Star in the constellation Virgo

    HAT-P-26 is a K-type main-sequence star located about 466 light-years (143 parsecs) away in the constellation of Virgo. A survey in 2015 did not find

    HAT-P-26

    HAT-P-26

  • HAT-P-19
  • Star in the constellation Andromeda

    HAT-P-19 is a K-type main-sequence star about 658 light-years away. The star is old yet metal-enriched, having amount of heavy elements 250% of solar

    HAT-P-19

    HAT-P-19

  • Sun hat
  • Wide-brimmed hat designed to shade face and shoulders from the sun

    A sun hat (also known as the floppy hat, harvest hat or field hat) is any hat or headgear specifically designed to shade the head, face, neck and shoulders

    Sun hat

    Sun hat

    Sun_hat

  • HAT-P-33
  • F-type star in the constellation Gemini

    HAT-P-33 (2MASS J07324421+335006, GSC 2461-00988) is a late-F dwarf star. It is orbited by a planet called HAT-P-33b. A search for a binary companion star

    HAT-P-33

    HAT-P-33

  • Asian conical hat
  • Cone-shaped hat worn in parts of Asia

    bamboo hat") in China; kasa (笠) in Japan; and satgat (삿갓) in Korea. English terms for the hat include bamboo hat, Chinese hat, coolie hat, paddy hat, rice

    Asian conical hat

    Asian conical hat

    Asian_conical_hat

  • Cowboy hat
  • Large hat associated with cowboys

    The cowboy hat is a high-crowned, wide-brimmed hat best known as the defining piece of attire for the North American cowboy. Today it is worn by many

    Cowboy hat

    Cowboy hat

    Cowboy_hat

  • HAT-P-24
  • F8 dwarf star in the constellation Gemini

    HAT-P-24 is an F8 dwarf star about 413 parsecs away. A planet was discovered with the transit method by the HATNet Project in 2010. HAT-P-24b, is a typical

    HAT-P-24

    HAT-P-24

  • The Cat in the Hat
  • 1957 children's book by Dr. Seuss

    The Cat in the Hat is a 1957 children's book written and illustrated by American author Theodor "Dr. Seuss" Geisel. The story centers on a tall anthropomorphic

    The Cat in the Hat

    The_Cat_in_the_Hat

  • HAT-P-8
  • Magnitude 10 F-type star in the constellation Pegasus

    HAT-P-8 is a magnitude 10 star located 700 light-years away in Pegasus. It is a F-type star about 28% more massive than the Sun. Two red dwarf companions

    HAT-P-8

    HAT-P-8

  • Top hat
  • Tall, flat-crowned formal hat

    A top hat (also called a high hat, or, informally, a topper) is a tall, flat-crowned hat traditionally associated with formal wear in Western dress codes

    Top hat

    Top hat

    Top_hat

  • Kasa (hat)
  • Traditional Japanese hat

    A kasa (笠) is any one of several traditional Japanese hats. Examples include amigasa and jingasa. Kasa is the correct way to pronounce the word when it

    Kasa (hat)

    Kasa (hat)

    Kasa_(hat)

  • Drools
  • Business rule management system

    BRMS Platform 5.1". Red Hat. Archived from the original on 2011-03-18. "JBoss Enterprise BRMS datasheet" (PDF). Red Hat. p4. "Drools - Business Rules

    Drools

    Drools

  • HAT-P-28
  • Star in the constellation Andromeda

    HAT-P-28 is the primary of a binary star system about 1320 light-years away. It is a G-type main-sequence star. The star's age is older than the Sun's

    HAT-P-28

    HAT-P-28

  • HAT-P-25
  • G-type main-sequence star

    HAT-P-25 is a G-type main-sequence star about 985 light-years away. It has a very low flare activity. The star is enriched in heavy elements, having about

    HAT-P-25

    HAT-P-25

  • Medicine Hat
  • City in Alberta, Canada

    Medicine Hat is a city in southeast Alberta, Canada. It is located along the South Saskatchewan River, west of the Saskatchewan border. It is approximately

    Medicine Hat

    Medicine Hat

    Medicine_Hat

  • List of footballers who achieved hat-trick records
  • football hat-trick scoring, including exceptional numbers of hat-tricks; exceptional feats in scoring a hat-trick; and achievements relating to the hat-trick

    List of footballers who achieved hat-trick records

    List of footballers who achieved hat-trick records

    List_of_footballers_who_achieved_hat-trick_records

  • HAT-P-65
  • Star in the constellation Equuleus

    HAT-P-65 is a faint star located in the equatorial constellation Equuleus. With an apparent magnitude of 13.16, it requires a telescope to be seen. The

    HAT-P-65

    HAT-P-65

  • Hat-trick
  • Achievement of three consecutive sporting feats

    A hat-trick or hat trick is the achievement of a generally positive feat three times in a match, or another achievement based on the number three. The

    Hat-trick

    Hat-trick

  • Jewish hat
  • Cone-shaped pointed hat, worn by Jews in Medieval Europe and parts of the Islamic world

    Jewish hat, also known as the Jewish cap, Judenhut (German) or Latin pileus cornutus ("horned skullcap"), was generally a cone-shaped pointed hat, often

    Jewish hat

    Jewish hat

    Jewish_hat

  • Curious George
  • Children's picture book character

    "The Man with the Yellow Hat" and taken from Africa to America where the two live together. George and the Man with the Yellow Hat become good friends. George's

    Curious George

    Curious_George

  • HAT-P-9b
  • Exoplanet in the constellation Auriga

    HAT-P-9b, formally named Alef, is an exoplanet approximately 1500 light years away in the constellation Auriga. This planet was found by the transit method

    HAT-P-9b

    HAT-P-9b

    HAT-P-9b

  • Jarque–Bera test
  • Normality test

    μ ^ 4 σ ^ 4 = 1 n ∑ i = 1 n ( x i − x ¯ ) 4 ( 1 n ∑ i = 1 n ( x i − x ¯ ) 2 ) 2 , {\displaystyle K={\frac {{\hat {\mu }}_{4}}{{\hat {\sigma }}^{4}}}={\frac

    Jarque–Bera test

    Jarque–Bera_test

  • Uncertainty principle
  • Foundational principle in quantum physics

    p ^ x ^ ) | ψ ⟩ = ( x ^ − x 0 I ^ ) p ^ | ψ ⟩ = i ℏ | ψ ⟩ , {\displaystyle [{\hat {x}},{\hat {p}}]|\psi \rangle =({\hat {x}}{\hat {p}}-{\hat {p}}{\hat

    Uncertainty principle

    Uncertainty principle

    Uncertainty_principle

  • HAT-P-20
  • Star in the constellation Gemini

    HAT-P-20 is a K-type main-sequence star about 233 light-years away. The star has a strong starspot activity, and its equatorial plane is misaligned by

    HAT-P-20

    HAT-P-20

  • Slouch hat
  • Wide-brimmed soft felt or cloth hat now most commonly worn as part of a military uniform

    A slouch hat is a wide-brimmed felt or cloth hat most commonly worn as part of a military uniform, often, although not always, with a chinstrap. It has

    Slouch hat

    Slouch hat

    Slouch_hat

  • Bucket hat
  • Cloth hat with a downward-sloping brim

    A bucket hat (variations of which include the fisherman's hat, Irish country hat and session hat) is a hat with a narrow, downward-sloping brim. Typically

    Bucket hat

    Bucket hat

    Bucket_hat

  • HATNet Project
  • Network of automated telescopes

    doi:10.1088/0004-6256/147/4/84. S2CID 119265999. Hartman, J. D.; et al. (2015). "HAT-P-50b, HAT-P-51b, HAT-P-52b, and HAT-P-53b: Three Transiting Hot

    HATNet Project

    HATNet_Project

  • The Cat in the Hat (2003 film)
  • 2003 film by Bo Welch

    Dr. Seuss' The Cat in the Hat (or simply The Cat in the Hat) is a 2003 American fantasy comedy film loosely based on the 1957 book by Dr. Seuss. Directed

    The Cat in the Hat (2003 film)

    The_Cat_in_the_Hat_(2003_film)

  • Hat Yai
  • Municipality in Songkhla, Thailand

    Hat Yai (Thai: หาดใหญ่, pronounced [hàːt̚ jàj]) is a city in southern Thailand near the Malaysian border. As of 2024, the municipality is the fifth-largest

    Hat Yai

    Hat Yai

    Hat_Yai

  • Kalman filter
  • Algorithm that estimates unknowns from a series of measurements over time

    + 1 ∣ k ) P k ∣ n = P k ∣ k + C k ( P k + 1 ∣ n − P k + 1 ∣ k ) C k T {\displaystyle {\begin{aligned}{\hat {\mathbf {x} }}_{k\mid n}&={\hat {\mathbf {x}

    Kalman filter

    Kalman filter

    Kalman_filter

  • Operator (physics)
  • Function acting on the space of physical states in physics

    Acting p ^ {\displaystyle \mathbf {\hat {p}} } on ψ obtains: p ^ x ψ = − i ℏ ∂ ∂ x ψ = p x ψ p ^ y ψ = − i ℏ ∂ ∂ y ψ = p y ψ p ^ z ψ = − i ℏ ∂ ∂ z ψ = p z

    Operator (physics)

    Operator_(physics)

  • Legionnaire hat
  • Wide-brimmed hat designed to shade face and neck from the sun

    A legionnaire hat, or legionnaires hat, is a wide-brimmed style of hat with a flap designed to provide sun protection for the forehead, ears, neck and

    Legionnaire hat

    Legionnaire hat

    Legionnaire_hat

  • Fez (hat)
  • Cylinder-shaped cap with a flat crown

    Exchange. Indiana University Press. p. 159. ISBN 978-0-253-04219-4. EKREM BUĞRA EKINCI (2016), Fez: A time-honored Ottoman hat from the Mediterranean, Daily

    Fez (hat)

    Fez (hat)

    Fez_(hat)

  • Purple hat therapy
  • Therapy crediting an unlikely new addition rather than established effective therapy

    eye movement as a "purple hat". Fallacy of composition Rosquist 2005, p. 94; Neudeck & Wittchen 2012, p4. Rosquist 2005, p. 94. For the original see

    Purple hat therapy

    Purple hat therapy

    Purple_hat_therapy

  • Zero sound
  • Collective excitation in a Fermi liquid

    ({\hat {p}})} , with ν ( p ^ ) {\displaystyle \nu ({\hat {p}})} given by ( ω − v F p ^ ⋅ k ^ ) ν ( p ^ ) = v F p ^ ⋅ k ^ ∫ d 2 p ^ ′ 4 π F ( p ^ , p ^

    Zero sound

    Zero_sound

  • List of Premier League hat-tricks
  • competition, the Premier League, in 1992, 206 players have scored three goals (a hat-trick) or more in a single match. The first player to achieve the feat was

    List of Premier League hat-tricks

    List of Premier League hat-tricks

    List_of_Premier_League_hat-tricks

  • Pileus (hat)
  • Felt conical or half-egg-shaped cap, worn in Ancient Greece, Rome and by ecclesiastics

    p. 88. ISBN 978-0-203-93880-5. Pannonia and Illyria also appear to have been especially associated with hats. Plautus (...) lampoons an Illyrian hat so

    Pileus (hat)

    Pileus (hat)

    Pileus_(hat)

  • Tricorne
  • Hat with the brim turned up on three sides

    The tricorne or tricorn is a style of hat in a triangular shape, which became popular in Europe during the 18th century, falling out of style by the early

    Tricorne

    Tricorne

    Tricorne

  • Pillbox hat
  • Style of hat

    A pillbox hat is a small hat with a flat crown, straight, upright sides, and no brim. It is named after the small cylindrical or hexagonal cases that were

    Pillbox hat

    Pillbox hat

    Pillbox_hat

  • The Cat in the Hat Comes Back
  • 1958 book by Dr. Seuss

    The Cat in the Hat Comes Back is a 1958 children's book written and illustrated by American author Theodor Geisel under his pen name Dr. Seuss. Published

    The Cat in the Hat Comes Back

    The_Cat_in_the_Hat_Comes_Back

  • Hardee hat
  • Union Army uniform of American Civil War era

    The Hardee hat, also known as the Model 1858 Dress Hat and sometimes nicknamed the "Jeff Davis", was the regulation dress hat for enlisted men in the Union

    Hardee hat

    Hardee hat

    Hardee_hat

  • Momentum operator
  • Operator in quantum mechanics

    particle in one spatial dimension, the definition is: p ^ = − i ℏ ∂ ∂ x {\displaystyle {\hat {p}}=-i\hbar {\frac {\partial }{\partial x}}} where ħ is

    Momentum operator

    Momentum_operator

  • Fedora
  • Felt hat with brim and indented crown

    generally less associated with formal dress. The fedora hat's brim is usually around 2.5 inches (6.4 cm) wide, but can be wider, can be left raw-edged (left

    Fedora

    Fedora

    Fedora

  • Straw Hats
  • Protagonists of media franchise One Piece

    The Straw Hat Crew (麦わらの一味, Mugiwara no Ichimi), or the Straw Hat Pirates (麦わら海賊団, Mugiwara Kaizokudan), also called just as the Straw Hats (麦わら, Mugiwara)

    Straw Hats

    Straw_Hats

  • Opera hat
  • Collapsible top hat

    Inventions, Volume 4. p. 64. ""Gibus" Opera Hat". McCord Museum. Archived from the original on 2013-11-03. Retrieved 2013-07-06. "Hat Glossary". Villagehatshop

    Opera hat

    Opera hat

    Opera_hat

  • List of FIFA World Cup hat-tricks
  • have scored a hat-trick for the losing side: Josef Hügi (5–7, 1954) and Igor Belanov (3–4, 1986). Two other players have scored a hat-trick in a game

    List of FIFA World Cup hat-tricks

    List of FIFA World Cup hat-tricks

    List_of_FIFA_World_Cup_hat-tricks

  • Beaver hat
  • Hat made of beaver fur felt

    A beaver hat is a hat made from felted beaver fur. They were fashionable across much of Europe during the period 1550–1850 because the soft yet resilient

    Beaver hat

    Beaver hat

    Beaver_hat

  • Straw hat
  • Hat made of straw

    A straw hat is a wide-brimmed hat that is woven out of straw or straw-like synthetic materials. Straw hats are a type of sun hat designed to shade the

    Straw hat

    Straw hat

    Straw_hat

  • Process capability index
  • Statistical measure of process capability

    {\displaystyle {\hat {\mu }}} and the estimated variability of the process (expressed as a standard deviation) is σ ^ {\displaystyle {\hat {\sigma }}} ,

    Process capability index

    Process_capability_index

  • Canonical commutation relation
  • Relation satisfied by conjugate variables in quantum mechanics

    Fourier transform of another). For example, [ x ^ , p ^ x ] = i ℏ I {\displaystyle [{\hat {x}},{\hat {p}}_{x}]=i\hbar \mathbb {I} } between the position

    Canonical commutation relation

    Canonical_commutation_relation

  • Schrödinger equation
  • Description of a quantum-mechanical system

    {\displaystyle x} and p {\displaystyle p} are promoted to self-adjoint operators x ^ {\displaystyle {\hat {x}}} and p ^ {\displaystyle {\hat {p}}} that satisfy

    Schrödinger equation

    Schrödinger_equation

  • Ushanka
  • Russian fur cap with ear flaps

    'ears'), also called an ushanka-hat (Russian: шапка-ушанка, romanized: shapka-ushanka, [ˈʂapkə ʊˈʂankə]), is a Russian fur hat with ear-covering flaps that

    Ushanka

    Ushanka

    Ushanka

  • Erling Haaland
  • Norwegian footballer (born 2000)

    scored his first Premier League hat-trick in a 4–2 win against Crystal Palace, and recorded his second, a perfect hat-trick, four days later in a 6–0

    Erling Haaland

    Erling Haaland

    Erling_Haaland

  • Quantum limit
  • Limit on measurements at quantum scales

    energy: p ^ b . a . ( t j ) = p ^ j b . a . − ⟨ p ^ j b . a . ⟩ = 2 c ( W ^ j − W ) , {\displaystyle {\hat {p}}^{\mathrm {b.a.} }(t_{j})={\hat {p}}_{j}^{\mathrm

    Quantum limit

    Quantum_limit

  • Top Hat
  • 1935 film by Mark Sandrich

    Top Hat is a 1935 American musical comedy film, in which Fred Astaire plays an American tap dancer named Jerry Travers, who arrives in London to star

    Top Hat

    Top Hat

    Top_Hat

  • ADS 16402
  • Binary star system in the constellation Lacerta

    Project, the secondary star is known as HAT-P-1, and the planet itself designated HAT-P-1b. HATNet Project or HAT Roman, Nancy G. (1987). "Identification

    ADS 16402

    ADS_16402

  • Karakul hat
  • Traditional sheep fur hat of Central and South Asia

    The Karakul hat (قراقلی), also known by other names, is a hat made from the fur (either Karakul fur [ru] or karakulcha) of the Karakul breed of sheep

    Karakul hat

    Karakul hat

    Karakul_hat

  • HD 233731
  • Suspected multiple star system in the constellation Ursa Major

    HD 233731, or HAT-P-22, is a suspected multiple star system in the northern circumpolar constellation of Ursa Major. It is invisible to the naked eye

    HD 233731

    HD_233731

  • Ermakov–Lewis invariant
  • Invariant in quantum mechanics

    {q}}^{2}\right]={\hat {T}}{\hat {I}}{\hat {T}}^{\dagger },\quad {\hat {T}}=e^{i{\frac {\ln \rho }{2}}({\hat {q}}{\hat {p}}+{\hat {p}}{\hat {q}})}e^{-i{\frac

    Ermakov–Lewis invariant

    Ermakov–Lewis_invariant

  • Extended Kalman filter
  • Filter for nonlinear state estimation

    ) ] ,  P ( t 0 ) = V a r [ x ( t 0 ) ] {\displaystyle {\hat {\mathbf {x} }}(t_{0})=E{\bigl [}\mathbf {x} (t_{0}){\bigr ]}{\text{, }}\mathbf {P} (t_{0})=Var{\bigl

    Extended Kalman filter

    Extended_Kalman_filter

  • Binomial proportion confidence interval
  • Statistical confidence interval for success counts

    ~{\frac {2n{\hat {p}}+z_{\alpha }^{2}-\left[z_{\alpha }{\sqrt {z_{\alpha }^{2}-{\frac {1}{n}}+4n{\hat {p}}\left(1-{\hat {p}}\right)+\left(4{\hat {p

    Binomial proportion confidence interval

    Binomial_proportion_confidence_interval

  • Laplace's approximation
  • Analytical expression in statistics

    {x}})\;\simeq \;p({\bf {y}},{\hat {\theta }}|{\bf {x}})\exp {\big (}-{\tfrac {1}{2}}(\theta -{\hat {\theta }})^{\top }S^{-1}(\theta -{\hat {\theta }}){\big

    Laplace's approximation

    Laplace's_approximation

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