| Years in Sweden: | 1662 1663 1664 1665 1666 1667 1668 |
| Centuries: | 16th century · 17th century · 18th century |
| Decades: | 1630s 1640s 1650s 1660s 1670s 1680s 1690s |
| Years: | 1662 1663 1664 1665 1666 1667 1668 |
Events from the year 1665 in Sweden
| Years in Sweden: | 1662 1663 1664 1665 1666 1667 1668 |
| Centuries: | 16th century · 17th century · 18th century |
| Decades: | 1630s 1640s 1650s 1660s 1670s 1680s 1690s |
| Years: | 1662 1663 1664 1665 1666 1667 1668 |
Events from the year 1665 in Sweden
 | This section needs expansion. You can help by adding to it. (June 2015) |
| | This section needs expansion. You can help by adding to it. (June 2015) |
Category theory is a general theory of mathematical structures and their relations. It was introduced by Samuel Eilenberg and Saunders Mac Lane in the middle of the 20th century in their foundational work on algebraic topology. Category theory is used in almost all areas of mathematics. In particular, many constructions of new mathematical objects from previous ones that appear similarly in several contexts are conveniently expressed and unified in terms of categories. Examples include quotient spaces, direct products, completion, and duality.
In music theory, a diatonic scale is any heptatonic scale that includes five whole steps and two half steps (semitones) in each octave, in which the two half steps are separated from each other by either two or three whole steps, depending on their position in the scale. This pattern ensures that, in a diatonic scale spanning more than one octave, all the half steps are maximally separated from each other.
An integer is the number zero (0), a positive natural number, or the negation of a positive natural number. The negations or additive inverses of the positive natural numbers are referred to as negative integers. The set of all integers is often denoted by the boldface Z or blackboard bold .
In western classical music theory, the minor scale refers to three scale patterns – the natural minor scale, the harmonic minor scale, and the melodic minor scale.
In mathematics, the natural numbers are the numbers 0, 1, 2, 3, etc., possibly excluding 0. Some define the natural numbers as the non-negative integers0, 1, 2, 3, ..., while others define them as the positive integers1, 2, 3, .... Some authors acknowledge both definitions whenever convenient. Some texts define the whole numbers as the natural numbers together with zero, excluding zero from the natural numbers, while in other writings, the whole numbers refer to all of the integers. The counting numbers refer to the natural numbers in common language, particularly in primary school education, and are similarly ambiguous although typically exclude zero.
The natural logarithm of a number is its logarithm to the base of the mathematical constant e, which is an irrational and transcendental number approximately equal to 2.718281828459. The natural logarithm of x is generally written as ln x, logex, or sometimes, if the base e is implicit, simply log x. Parentheses are sometimes added for clarity, giving ln(x), loge(x), or log(x). This is done particularly when the argument to the logarithm is not a single symbol, so as to prevent ambiguity.
Natural language processing (NLP) is an interdisciplinary subfield of computer science and artificial intelligence. It is primarily concerned with providing computers with the ability to process data encoded in natural language and is thus closely related to information retrieval, knowledge representation and computational linguistics, a subfield of linguistics. Typically data is collected in text corpora, using either rule-based, statistical or neural-based approaches in machine learning and deep learning.
Natural law is a system of law based on a close observation of natural order and human nature, from which values, thought by natural law's proponents to be intrinsic to human nature, can be deduced and applied independently of positive law. According to the theory of law called jusnaturalism, all people have inherent rights, conferred not by act of legislation but by "God, nature, or reason". Natural law theory can also refer to "theories of ethics, theories of politics, theories of civil law, and theories of religious morality".
A black panther is the melanistic colour variant of the leopard and the jaguar. Black panthers of both species have excess black pigments, but their typical rosettes are also present. They have been documented mostly in tropical forests, with black leopards in Africa and Asia, and black jaguars in South America. Melanism is caused by a recessive allele in the leopard, and by a dominant allele in the jaguar.
In category theory, a branch of mathematics, a natural transformation provides a way of transforming one functor into another while respecting the internal structure of the categories involved. Hence, a natural transformation can be considered to be a "morphism of functors". Informally, the notion of a natural transformation states that a particular map between functors can be done consistently over an entire category.
A natural disaster is the very harmful impact on a society or community after a natural hazard event. Some examples of natural hazard events include avalanches, droughts, earthquakes, floods, heat waves, landslides, tropical cyclones, volcanic activity and wildfires. Additional natural hazards include blizzards, dust storms, firestorms, hails, ice storms, sinkholes, thunderstorms, tornadoes and tsunamis. A natural disaster can cause loss of life or damage property. It typically causes economic damage. How bad the damage is depends on how well people are prepared for disasters and how strong the buildings, roads, and other structures are. Scholars have been saying that the term natural disaster is unsuitable and should be abandoned. Instead, the simpler term disaster could be used. At the same time the type of hazard would be specificed. A disaster happens when a natural or human-made hazard impacts a vulnerable community. It results from the combination of the hazard and the exposure of a vulnerable society.
2 (two) is a number, numeral and digit. It is the natural number following 1 and preceding 3. It is the smallest and the only even prime number.
A Doctor of Science is a science doctorate awarded in a number of countries throughout the world.
The United States Senate Committee on Energy and Natural Resources is a standing committee of the United States Senate. It has jurisdiction over matters related to energy and mineral resources, including nuclear development; irrigation and reclamation, territorial possessions of the United States, trust lands appertaining to America's indigenous peoples, and the conservation, use, and disposition of federal lands. Its roots go back to the Committee on Interior and Insulars Affairs. In 1977, it became the Committee on Energy and Natural Resources, and most matters regarding Native Americans, Alaska Natives, and Native Hawaiians were removed from its jurisdiction and transferred to the Committee on Indian Affairs.
The U.S. House Committee on Natural Resources or Natural Resources Committee is a Congressional committee of the United States House of Representatives. Originally called the Committee on Interior and Insular Affairs (1951), the name was changed to the Committee on Natural Resources in 1991. The name was shortened to the Committee on Resources in 1995 by the new chairman, Don Young. Following the Democratic takeover of the House of Representatives in 2006, the name of the committee was changed back to its title used between 1991 and 1995.
Amphibian Species of the World 6.2: An Online Reference (ASW) is a herpetology database. It lists the names of frogs, salamanders and other amphibians, which scientists first described each species and what year, and the animal's known range.
Diplodocus was a genus of diplodocid sauropod dinosaurs, whose fossils were first discovered in 1877 by S. W. Williston. The generic name, coined by Othniel Charles Marsh in 1878, is a Neo-Latin term derived from Greek διπλός (diplos) "double" and δοκός (dokos) "beam", in reference to the double-beamed chevron bones located in the underside of the tail, which were then considered unique.
Guy Graham Musser was an American zoologist. His main research was in the field of the rodent subfamily Murinae, in which he has described many new species.
In logic, a quantifier is an operator that specifies how many individuals in the domain of discourse satisfy an open formula. For instance, the universal quantifier in the first order formula expresses that everything in the domain satisfies the property denoted by . On the other hand, the existential quantifier in the formula expresses that there exists something in the domain which satisfies that property. A formula where a quantifier takes widest scope is called a quantified formula. A quantified formula must contain a bound variable and a subformula specifying a property of the referent of that variable.
The World Spider Catalog (WSC) is an online searchable database concerned with spider taxonomy. It aims to list all accepted families, genera and species, as well as provide access to the related taxonomic literature. The WSC began as a series of individual web pages in 2000, created by Norman I. Platnick of the American Museum of Natural History. After Platnick's retirement in 2014, the Natural History Museum of Bern (Switzerland) took over the catalog, converting it to a relational database.
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