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Dual Matroid
Dual or Duals may refer to: Paired/two things * Dual (mathematics), a notion of paired concepts that mirror one another ** Dual (category theory), a formalization of mathematical duality *** see more cases in :Duality theories * Dual number, a number system used in automatic differentiation * Dual (grammatical number), a grammatical category used in some languages * Dual county, a Gaelic games county which competes in both Gaelic football and hurling * Dual diagnosis, a psychiatric diagnosis of co-occurrence of substance abuse and a mental problem * Dual fertilization, simultaneous application of a P-type and N-type fertilizer * Dual impedance, electrical circuits that are the dual of each other * Dual SIM cellphone supporting use of two SIMs * Aerochute International Dual a two-seat Australian powered parachute design Acronyms and other uses * Dual (brand), a manufacturer of Hifi equipment * DUAL (cognitive architecture), an artificial intelligence design model * DUA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual (mathematics)
In mathematics, a duality translates concepts, theorems or mathematical structures into other concepts, theorems or structures in a Injective function, one-to-one fashion, often (but not always) by means of an Involution (mathematics), involution operation: if the dual of is , then the dual of is . In other cases the dual of the dual – the double dual or bidual – is not necessarily identical to the original (also called ''primal''). Such involutions sometimes have fixed point (mathematics), fixed points, so that the dual of is itself. For example, Desargues' theorem is self-dual in this sense under the ''standard duality (projective geometry), duality in projective geometry''. In mathematical contexts, ''duality'' has numerous meanings. It has been described as "a very pervasive and important concept in (modern) mathematics" and "an important general theme that has manifestations in almost every area of mathematics". Many mathematical dualities between objects of two type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DUAL Table
The DUAL table is a special one-row, one-column table present by default in Oracle and other database installations. In Oracle, the table has a single VARCHAR2(1) column called DUMMY that has a value of 'X'. It is suitable for use in selecting a pseudo column such as SYSDATE or USER. Example use Oracle's SQL syntax requires the FROM clause but some queries don't require any tables - DUAL can be used in these cases. SELECT 1+1 FROM dual; SELECT 1 FROM dual; SELECT USER FROM dual; SELECT SYSDATE FROM dual; SELECT * FROM dual; History Charles Weiss explains why he created DUAL: I created the DUAL table as an underlying object in the Oracle Data Dictionary. It was never meant to be seen itself, but instead used inside a view that was expected to be queried. The idea was that you could do a JOIN to the DUAL table and create two rows in the result for every one row in your table. Then, by using GROUP BY, the resulting join could be summarized to show the amount of sto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duo (other)
Duo may refer to: Places * Duo, West Virginia, an unincorporated community and coal town in Greenbrier County, West Virginia * Duo, Tampere, a shopping centre in Hervanta, Tampere, Finland * DUO, a twin-tower development in Singapore Arts, entertainment and media Fictional characters * Duo (''Mega Man''), a fictional protagonist in the Capcom video game series ''Mega Man'' * Duo Maxwell, a fictional protagonist in the television series ''Gundam Wing'' * Duo, the fictional owl mascot of the language learning website and mobile application Duolingo Films * ''Duo'' (2006 film), a Canadian romantic comedy film directed by Richard Ciupka * ''Pas de deux'' (film), a 1969 Canadian film also known as ''Duo'' Music * Duet or duo, a musical piece performed by two musicians * Musical duo, a musical ensemble composed of two musicians Albums * ''Duo'' (Kenny Drew and Niels-Henning Ørsted Pedersen album), 1973 *'' Duo 2'', Kenny Drew and Niels-Henning Ørsted Pedersen album, 1974 * ''Duo' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double (other)
Double, The Double or Dubble may refer to: Mathematics and computing * Multiplication Multiplication is one of the four elementary mathematical operations of arithmetic, with the other ones being addition, subtraction, and division (mathematics), division. The result of a multiplication operation is called a ''Product (mathem ... by 2 * Double precision, a floating-point representation of numbers that is typically 64 bits in length * A double number of the form x+yj, where j^2=+1 * A 2- tuple, or ordered list of two elements, commonly called an ordered pair, denoted (a,b) * Double (manifold), in topology Food and drink * A drink order of two shots of hard liquor in one glass * A "double decker", a hamburger with two patties in a single bun Games * Double, action in games whereby a competitor raises the stakes ** , in contract bridge ** Doubling cube, in backgammon ** Double, doubling a blackjack bet in a favorable situation ** Double, a bet offered by UK bookm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duel (other)
A duel is a pre-arranged, private fight between two persons to settle a point of honour or personal quarrel. Duel may also mean more than one, i.e. 2. Most commonly used in the phrase COLAS Duel .LAW Duel may also refer to: Combat *Duel, any competition between two persons or parties *Duel, a fight between two animals (see tournament species) *Duel, single combat, in general *Duel, the wager of battle Arts, entertainment, and media Films * ''Duel'' (1971 film), a film directed by Steven Spielberg * ''Duel'' (2004 film), an Iranian film directed by Ahmad Reza Darvish Games * ''Duels'' (video game), a web-based role-playing game Music ;Groups * Duels (band), an English band from Leeds ;Songs and albums * "Duel" (Morganne Matis song), 2004 * "Duel" (Propaganda song), 1985 *"Duel", a song by Bond from '' Born'' *"Duel", a song by Swervedriver from '' Mezcal Head'' *''Duel'', a 2017 album by Quentin Mosimann *'' Duél'', a 2025 album by Jinjer Television * ''Duel'' (Ameri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duality (other)
Duality may refer to: Mathematics * Duality (mathematics), a mathematical concept ** Dual (category theory), a formalization of mathematical duality ** Duality (optimization) ** Duality (order theory), a concept regarding binary relations ** Duality (projective geometry), general principle of projective geometry ** Duality principle (Boolean algebra), the extension of order-theoretic duality to Boolean algebras ** S-duality (homotopy theory) * Philosophy, logic, and psychology * Dualistic cosmology, a twofold division in several spiritual and religious worldviews * Dualism (philosophy of mind), where the body and mind are considered to be irreducibly distinct * De Morgan's laws, specifically the ability to generate the dual of any logical expression * Complementary duality of Carl Jung's functions and types in Socionics * Duality (CoPs), refers to the notion of a duality in a Community of Practice Science Electrical and mechanical * Duality (electrical circuits), re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Duals
The Duals were an American surf rock duo formed in Los Angeles, California, in 1961. Much of the collaboration's music capitalized on the style of music popularized in Southern California in the early 1960s. They reached the national charts with their song "Stick Shift" which became the Duals' only Top 40 hit. A studio album named after the Duals' hit song was released the following year. History The Duals featured the partnership of Henry Bellinger ( lead guitar) and Johnny Lageman ( rhythm guitar), two friends who lived in the same neighborhood in Los Angeles. In 1961, the duo approached H. B. Barnum with hopes that the record producer would record them in Hollywood. Barnum, however, had little faith in the songs the Duals had written, but recommended them to Ron Barrett, an aspiring producer who recently established his own record label, Star Revue. Barrett was more receptive to the duo's simple, but upbeat, sound influenced by California's burgeoning surf scene. After ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duals
''Duals'' is a compilation album by the Irish rock band U2. It was released in April 2011 to u2.com subscribers. Track listing :* "Where the Streets Have No Name" and "Amazing Grace" are studio mix of U2's performance at the Rose Bowl, Pasadena, 25 October 2009 and Soweto Gospel Choir's parts recorded in South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ... in sync with U2's performance. :* "The Wanderer" taken from the '' Zooropa'' album, 1993. :* "Falling at Your Feet" taken from ''The Million Dollar Hotel'' soundtrack, 2000. :* "Miss Sarajevo" taken from '' Passengers: Original Soundtracks 1'', 1995. :* "Slow Dancing" was a B-side to " If God Will Send His Angels" single, 1997. :* "The Saints are Coming" taken from the '' U218 Singles'' compilation, 2006. :* ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual (EP)
''Dual'' is an EP released in July 2013 by British electronic music singer, songwriter and producer Sampha from Morden, South London, United Kingdom. Critical reception ''Dual'' received positive reviews from most music critics. Zach Kelly of Pitchfork Media ''Pitchfork'' (formerly ''Pitchfork Media'') is an American online music magazine founded in 1996 by Ryan Schreiber in Minneapolis. It originally covered Alternative rock, alternative and independent music, and expanded to cover genres includin ... stated, "For someone so willing to lay himself this bare as a first impression is rare, but in terms of the music found on 'Dual', nothing could be more natural." Track listing Personnel * Sampha - Composer, Mixing, Primary Artist, Producer *Ben Walker - Artwork References {{DEFAULTSORT:Dual 2013 EPs Sampha albums Young (record label) albums ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual (album)
''Dual'' is an album by four acclaimed Irish and Scottish musicians: Éamon Doorley, Muireann Nic Amhlaoibh (both prominently of Danú), Julie Fowlis and Ross Martin. The artists released the album in October 2008 on their official websites. The album was planned to project the similarities and differences between the Irish and Scottish Gaelic song traditions. The album features Scottish waulking songs such as ''Alasdair Mhic Cholla Ghasda'', and an Irish equivalent to the Scottish puirt à beul. The songs are set in a traditional/folk accompaniment, very different from the recorded versions of a few of the songs by Capercaillie and Clannad. The four musicians have been playing music together since a sing-song at the Tønder Festival in 2003. The four-piece has toured together twice a year both in Ireland and Scotland. Julie and Muireann have had very similar upbringings and found their music and languages shared many common threads. Hence the name, ''Dual'', which m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual! Parallel Trouble Adventure
is a Japanese anime series animated by AIC and created by Masaki Kajishima, best known for the '' Tenchi Muyo!'' franchise. It was originally broadcast on Wowow from April to July 1999 and was licensed in the US by Pioneer LDC, later known as Geneon. In addition to the original TV run, an OVA special was added to conclude the series as a de facto "14th episode". The title refers to the fact that the story takes place in two parallel universes, a concept loosely based on multiverse theory. Plot 22 years ago, a huge alien artifact is found on a construction site by a worker named Yotsuga. The foreman orders that the artifact be broken apart to avoid delays. As Yotsuga walks towards the dumpsters to dispose of a small piece of the artifact, the world splits into two. In one world, Yotsuga tosses away the piece and the artifact is destroyed. In the other world, Yotsuga keeps the artifact, leading to the discovery of extraterrestrial technology that changes history. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual (Heroes)
"Dual" is the thirteenth episode and mid-season finale of the third season of the NBC superhero drama Drama is the specific Mode (literature), mode of fiction Mimesis, represented in performance: a Play (theatre), play, opera, mime, ballet, etc., performed in a theatre, or on Radio drama, radio or television.Elam (1980, 98). Considered as a g ... series '' Heroes'' and forty-seventh episode overall. The episode aired on December 15, 2008, as the conclusion to the "Volume 3: Villains" storyline. The episode, which was originally titled "War", is the final episode of the "Villains" story arc, and was the last episode to be written and produced by Jeph Loeb prior to his departure from ''Heroes'' in November 2008. Plot At Pinehearst, Peter explains to Nathan that Sylar killed their father and it was the only way to stop his plan. Nathan reveals that he has taken over and warns Peter to stay out of the way, causing Peter to knock him unconscious. He then goes to destroy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
