|
Therefore Sign
In logical argument and mathematical proof, the therefore sign, , is generally used before a logical consequence, such as the conclusion of a syllogism. The symbol consists of three dots placed in an upright triangle and is read ''therefore''. While it is not generally used in formal writing, it is used in mathematics and shorthand. History According to Florian Cajori in ''A History of Mathematical Notations,'' the Swiss mathematician Johann Rahn used both an upright and an inverted triangle of dots to mean ''therefore''. In the German edition of ''Teutsche Algebra'' (1659), he used the upright triangle with its modern meaning, but in the 1668 English edition Rahn used the inverted triangle more often to mean 'therefore'. Other authors in the 18th century also used three dots in a triangle shape to signify 'therefore', but as with Rahn, there was little consistency as to how the triangle was oriented. Use of an upright triangle exclusively to mean ''therefore'' (and an inverted t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logical Consequence
Logical consequence (also entailment or logical implication) is a fundamental concept in logic which describes the relationship between statement (logic), statements that hold true when one statement logically ''follows from'' one or more statements. A Validity (logic), valid logical argument is one in which the Consequent, conclusion is entailed by the premises, because the conclusion is the consequence of the premises. The philosophical analysis of logical consequence involves the questions: In what sense does a conclusion follow from its premises? and What does it mean for a conclusion to be a consequence of premises?Beall, JC and Restall, Greg, Logical Consequence' The Stanford Encyclopedia of Philosophy (Fall 2009 Edition), Edward N. Zalta (ed.). All of philosophical logic is meant to provide accounts of the nature of logical consequence and the nature of logical truth. Logical consequence is logical truth, necessary and Formalism (philosophy of mathematics), formal, by wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Similar Signs
Similarity may refer to: In mathematics and computing * Similarity (geometry), the property of sharing the same shape * Matrix similarity, a relation between matrices * Similarity measure, a function that quantifies the similarity of two objects ** Cosine similarity, which uses the angle between vectors ** String metric, also called string similarity ** Semantic similarity, in computational linguistics In linguistics * Lexical similarity * Semantic similarity In other fields * Similitude (model), in engineering, describing the geometric, kinematic and dynamic 'likeness' of two or more systems * Similarity (psychology) * Similarity (philosophy) * Similarity (signal processing) * Musical similarity * Chemical similarity * Similarity (network science) * Structural similarity * Similar (film), ''Similar'' (film), an upcoming South Korean film See also * * Same (other) * Difference (other) * Equality (mathematics) * Identity (philosophy) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freemasonry
Freemasonry (sometimes spelled Free-Masonry) consists of fraternal groups that trace their origins to the medieval guilds of stonemasons. Freemasonry is the oldest secular fraternity in the world and among the oldest still-existing organizations in history. Modern Freemasonry broadly consists of three main traditions: *Anglo-American Freemasonry, Anglo-American style Freemasonry, which insists that a "volume of sacred law", such as the Bible, Quran, or other religious text be open in a working Masonic lodge, lodge, that every member professes belief in a God, supreme being, that only men be admitted, and discussion of religion or politics does not take place within the lodge. *Continental Freemasonry or Liberal Freemasonry which has continued to evolve beyond these restrictions, particularly regarding religious belief and political discussion. *Co-Freemasonry, Women Freemasonry or Co-Freemasonry, which includes organizations that either admit women exclusively (such as the Ord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Map Symbol ...
This is a list of symbols appearing on Japanese maps. These symbols are called in the Japanese language. Partial list of symbols for users with visual impairment Official symbols according to the conventions of the Geographical Survey Institute of Japan appear with a circle below. See also * * * (GSI) External links Japanese map symbols* * This is a very good reference, it has separate links for each symbol. * * {{webtrans, http://www.its-mo.com/stc/help/icon.html, Map symbols from the Its-mo online map, ja Japanese map Maps of Japan Geography of Japan Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteorology
Meteorology is the scientific study of the Earth's atmosphere and short-term atmospheric phenomena (i.e. weather), with a focus on weather forecasting. It has applications in the military, aviation, energy production, transport, agriculture, construction, weather warnings and disaster management. Along with climatology, atmospheric physics and atmospheric chemistry, meteorology forms the broader field of the atmospheric sciences. The interactions between Earth's atmosphere and its oceans (notably El Niño and La Niña) are studied in the interdisciplinary field of hydrometeorology. Other interdisciplinary areas include biometeorology, space weather and planetary meteorology. Marine weather forecasting relates meteorology to maritime and coastal safety, based on atmospheric interactions with large bodies of water. Meteorologists study meteorological phenomena driven by solar radiation, Earth's rotation, ocean currents and other factors. These include everyday ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triangle
A triangle is a polygon with three corners and three sides, one of the basic shapes in geometry. The corners, also called ''vertices'', are zero-dimensional points while the sides connecting them, also called ''edges'', are one-dimensional line segments. A triangle has three internal angles, each one bounded by a pair of adjacent edges; the sum of angles of a triangle always equals a straight angle (180 degrees or π radians). The triangle is a plane figure and its interior is a planar region. Sometimes an arbitrary edge is chosen to be the ''base'', in which case the opposite vertex is called the ''apex''; the shortest segment between the base and apex is the ''height''. The area of a triangle equals one-half the product of height and base length. In Euclidean geometry, any two points determine a unique line segment situated within a unique straight line, and any three points that do not all lie on the same straight line determine a unique triangle situated w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterisks
The asterisk ( ), from Late Latin , from Ancient Greek , , "little star", is a typographical symbol. It is so called because it resembles a conventional image of a heraldic star. Computer scientists and mathematicians often vocalize it as star (as, for example, in ''the A* search algorithm'' or '' C*-algebra''). An asterisk is usually five- or six-pointed in print and six- or eight-pointed when handwritten, though more complex forms exist. Its most common use is to call out a footnote. It is also often used to censor offensive words. In computer science, the asterisk is commonly used as a wildcard character, or to denote pointers, repetition, or multiplication. History The asterisk was already in use as a symbol in ice age cave paintings. There is also a two-thousand-year-old character used by Aristarchus of Samothrace called the , , which he used when proofreading Homeric poetry to mark lines that were duplicated. Origen is known to have also used the aster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asterism (typography)
In typography, an asterism, , is a typographic symbol consisting of three asterisks placed in a triangle, which is used for a variety of purposes. The name originates from the astronomy, astronomical term for a Asterism (astronomy), group of stars.From the Greek ''astēr'' (star) Alexander Humez, Nicholas D. Humez (2008). ''On the Dot: The Speck That Changed the World'', p. 72 & 186n. . The asterism was originally used as a type of dinkus in typography, though increasingly rarely. It can also be used to mean "untitled" or author or title withheld as seen, for example, in some editions of ''Album for the Young'' by composer Robert Schumann (№ 21, 26, and 30). In meteorology, an asterism in a station model plot indicates moderate snowfall. Dinkus A dinkus is a typographical device to divide text, such as at Section (typography)#Flourished section breaks, section breaks. Its purpose is to "indicate minor breaks in text", to call attention to a passage, or to separate sub-cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamil Language
Tamil (, , , also written as ''Tamizhil'' according to linguistic pronunciation) is a Dravidian language natively spoken by the Tamil people of South Asia. It is one of the longest-surviving classical languages in the world,. "Tamil is one of the two longest-surviving classical languages in India" (p. 7). attested since 300 BC, 300 BCE.: "...the most acceptable periodisation which has so far been suggested for the development of Tamil writing seems to me to be that of A Chidambaranatha Chettiar (1907–1967): 1. Sangam Literature – 200BC to AD 200; 2. Post Sangam literature – AD 200 – AD 600; 3. Early Medieval literature – AD 600 to AD 1200; 4. Later Medieval literature – AD 1200 to AD 1800; 5. Pre-Modern literature – AD 1800 to 1900" at p. 610 Tamil was the lingua franca for early maritime traders in South India, with Tamil inscriptions found outside of the Indian subcontinent, such as Indonesia, Thailand, and Egypt. The language has a well-documented history wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
āytam
In Sanskrit phonology, Visarga () is the name of the voiceless glottal fricative, written in Devanagari as '' . It was also called, equivalently, ' by earlier grammarians. The word ''visarga'' () literally means "sending forth, discharge". Visarga is an allophone of and in pausa (at the end of an utterance). Since is a common inflectional suffix (of nominative singular, second person singular, etc.), visarga appears frequently in Sanskrit texts. In the traditional order of Sanskrit sounds, visarga and anusvāra appear between vowels and stop consonants. The precise pronunciation of visarga in Vedic texts may vary between Śākhās. Some pronounce a slight echo of the preceding vowel after the aspiration: will be pronounced , and will be pronounced . Visarga is not to be confused with colon. Types The visarga is commonly found in writing, resembling the punctuation mark of colon or as two tiny circles one above the other. This form is retained by most Indic scripts. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamil Script
The Tamil script ( ) is an abugida script that is used by Tamils and Tamil language, Tamil speakers in India, Sri Lanka, Malaysia, Singapore and elsewhere to write the Tamil language. It is one of the official scripts of the Indian Republic. Certain minority languages such as Saurashtra language, Saurashtra, Badaga language, Badaga, Irula language, Irula and Paniya language, Paniya are also written in the Tamil script. Characteristics The Tamil script has 12 vowels (, , "soul-letters"), 18 consonants (, , "body-letters") and one special character, the (, ). is called "அக்கு", ''akku,'' and is classified in Tamil orthography as being neither a consonant nor a vowel. However, it is listed at the end of the vowel set. The script is Syllabary, syllabic, not alphabetic, and is written from left to right. History The Tamil script, like the other Brahmic scripts, is thought to have evolved from the original Brahmi script. The earliest inscriptions which are accepted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LaTeX
Latex is an emulsion (stable dispersion) of polymer microparticles in water. Latices are found in nature, but synthetic latices are common as well. In nature, latex is found as a wikt:milky, milky fluid, which is present in 10% of all flowering plants (angiosperms) and in some Mushroom, mushrooms (especially species of ''Lactarius''). It is a complex emulsion that coagulation, coagulates on exposure to air, consisting of proteins, alkaloids, starches, sugars, Vegetable oil, oils, tannins, resins, and Natural gum, gums. It is usually exuded after tissue injury. In most plants, latex is white, but some have yellow, orange, or scarlet latex. Since the 17th century, latex has been used as a term for the fluid substance in plants, deriving from the Latin word for "liquid". It serves mainly as Antipredator adaptation, defense against Herbivore, herbivores and Fungivore, fungivores.Taskirawati, I. and Tuno, N., 2016Fungal defense against mycophagy in milk caps ''Science Report Kanazaw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
