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81 (number)
81 (eighty-one) is the natural number following 80 (number), 80and preceding 82 (number), 82. In mathematics 81 is: * the square number, square of 9 (number), 9 and the second fourth-power of a prime; 34. * with an aliquot sum of 40 (number), 40; within an aliquot sequence of three composite numbers (81,40 (number), 40,50 (number), 50,43 (number), 43,1 (number), 1,0) to the Prime in the 43 (number), 43-aliquot tree. * a perfect totient number like all Power of three, powers of three. * a heptagonal number. * an Polygonal number, icosioctagonal number. * a centered octagonal number. * a tribonacci number. * an open meandric number. * the ninth member of the Mian-Chowla sequence. * a palindromic number in bases 8 (1218) and 26 (3326). * a Harshad number in bases 2, 3, 4, 7, 9, 10 and 13. * one of three non-trivial numbers (the other two are 1458 (number), 1458 and 1729 (number), 1729) which, when its digits (in decimal) are added together, produces a sum which, when multiplied by its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Number
In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive integers Some authors acknowledge both definitions whenever convenient. Sometimes, the whole numbers are the natural numbers as well as zero. In other cases, the ''whole numbers'' refer to all of the integers, including negative integers. The counting numbers are another term for the natural numbers, particularly in primary education, and are ambiguous as well although typically start at 1. The natural numbers are used for counting things, like "there are ''six'' coins on the table", in which case they are called ''cardinal numbers''. They are also used to put things in order, like "this is the ''third'' largest city in the country", which are called ''ordinal numbers''. Natural numbers are also used as labels, like Number (sports), jersey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Meandric Number
In mathematics, a meander or closed meander is a self-avoiding closed curve which crosses a given line a number of times, meaning that it intersects the line while passing from one side to the other. Intuitively, a meander can be viewed as a meandering river with a straight road crossing the river over a number of bridges. The points where the line and the curve cross are therefore referred to as "bridges". Meander Given a fixed line ''L'' in the Euclidean plane, a meander of order ''n'' is a self-avoiding closed curve in the plane that crosses the line at 2''n'' points. Two meanders are equivalent if one meander can be continuously deformed into the other while maintaining its property of being a meander and leaving the order of the bridges on the road, in the order in which they are crossed, invariant. Examples The single meander of order 1 intersects the line twice: : This meander intersects the line four times and thus has order 2: : There are two meanders of order 2. Flip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toronto Raptors
The Toronto Raptors are a Canadian professional basketball team based in Toronto. The Raptors compete in the National Basketball Association (NBA) as a member of the Atlantic Division (NBA), Atlantic Division of the Eastern Conference (NBA), Eastern Conference. The team plays its home games at Scotiabank Arena, which it shares with the Toronto Maple Leafs of the National Hockey League (NHL). The team was founded in 1995 as part of the NBA's Expansion of the NBA, expansion into Canada, along with the Vancouver Grizzlies. Since the 2001–02 NBA season, 2001–02 season, the Raptors have been the only Canadian team in the league, as the Grizzlies Vancouver Grizzlies relocation to Memphis, relocated from Vancouver to Memphis Grizzlies, Memphis, Tennessee. As with most expansion teams, the Raptors struggled in their early years, but after the acquisition of Vince Carter through a 1998 NBA draft, draft-day trade in 1998, the franchise set league-attendance records and made the NBA p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kobe Bryant
Kobe Bean Bryant ( ; August 23, 1978 – January 26, 2020) was an American professional basketball player. A shooting guard, he List of NBA players who have spent their entire career with one franchise, spent his entire 20-year career with the Los Angeles Lakers in the National Basketball Association (NBA). Widely regarded as one of the greatest and most influential basketball players of all time, Bryant won five NBA Finals, NBA championships and was an 18-time NBA All-Star, All-Star, four-time NBA All-Star Game Kobe Bryant Most Valuable Player, All-Star MVP, 15-time member of the All-NBA Team, 12-time member of the NBA All-Defensive Team, All-Defensive Team, the 2008 NBA Most Valuable Player (MVP), two-time Bill Russell NBA Finals Most Valuable Player Award, NBA Finals MVP, and two-time List of NBA annual scoring leaders, scoring champion. He ranks fourth in List of National Basketball Association career scoring leaders, league all-time regular season and List of NBA career p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Liberation Army
The People's Liberation Army (PLA) is the military of the Chinese Communist Party (CCP) and the People's Republic of China (PRC). It consists of four Military branch, services—People's Liberation Army Ground Force, Ground Force, People's Liberation Army Navy, Navy, People's Liberation Army Air Force, Air Force, and People's Liberation Army Rocket Force, Rocket Force—and four arms—People's Liberation Army Aerospace Force, Aerospace Force, People's Liberation Army Cyberspace Force, Cyberspace Force, People's Liberation Army Information Support Force, Information Support Force, and People's Liberation Army Joint Logistics Support Force, Joint Logistics Support Force. It is led by the Central Military Commission (China), Central Military Commission (CMC) with its Chairman of the Central Military Commission (China), chairman as Supreme Military Command of the People's Republic of China, commander-in-chief. The PLA can trace its origins during the Republic of China (1912– ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hells Angels
The Hells Angels Motorcycle Club (HAMC) is an international outlaw motorcycle club founded in California whose members typically ride Harley-Davidson motorcycles. In the United States and Canada, the Hells Angels are incorporated as the Hells Angels Motorcycle Corporation. Common nicknames for the club are the "H.A.", "Red & White", and "81". With a membership of over 6,000, and 592 charters in 66 countries, the HAMC is the largest outlaw biker club in the world. The Hells Angels have a history of involvement in organized crime, such as drug trafficking, and engaging in violent conflict with other outlaw motorcycle clubs. Involvement in organized crime and violence has historically extended to the organization's most senior leadership. Many police and international intelligence agencies, including the United States Department of Justice, the Criminal Intelligence Service Canada, the Australian Federal Police, and Europol, consider the club an organized crime syndicate. Histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taoism
Taoism or Daoism (, ) is a diverse philosophical and religious tradition indigenous to China, emphasizing harmony with the Tao ( zh, p=dào, w=tao4). With a range of meaning in Chinese philosophy, translations of Tao include 'way', 'road', 'path', or 'technique', generally understood in the Taoist sense as an enigmatic process of transformation Ultimate reality, ultimately underlying reality. Taoist thought has informed the development of various practices within the Taoist tradition and beyond, including forms of Taoist meditation, meditation, Chinese astrology, astrology, qigong, feng shui, and Neidan, internal alchemy. A common goal of Taoist practice is self-cultivation, a deeper appreciation of the Tao, and more harmonious existence. Taoist ethics vary, but generally emphasize such virtues as ''wu wei, effortless action'', ziran, ''naturalness'', ''pu (Taoism), simplicity'', and the Three Treasures (Taoism), three treasures of compassion, frugality, and humility. The co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tao Te Ching
The ''Tao Te Ching'' () or ''Laozi'' is a Chinese classic text and foundational work of Taoism traditionally credited to the sage Laozi, though the text's authorship and date of composition and compilation are debated. The oldest excavated portion dates to the late 4th century BC. The ''Tao Te Ching'' is central to both philosophical and religious Taoism, and has been highly influential to Chinese philosophy and Religion in China, religious practice in general. It is generally taken as preceding the ''Zhuangzi (book), Zhuangzi'', the other core Taoist text.. Terminology originating within the text has been reinterpreted and elaborated upon by Legalism (Chinese philosophy), Legalist thinkers, Confucianists, and particularly Chinese Buddhists, introduced to China significantly after the initial solidification of Taoist thought. One of the most translated texts in world literature, the text is well known in the West.. Title In English, the title is commonly rendered ''Tao ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recurring Decimal
A repeating decimal or recurring decimal is a decimal representation of a number whose digits are eventually periodic (that is, after some place, the same sequence of digits is repeated forever); if this sequence consists only of zeros (that is if there is only a finite number of nonzero digits), the decimal is said to be ''terminating'', and is not considered as repeating. It can be shown that a number is rational if and only if its decimal representation is repeating or terminating. For example, the decimal representation of becomes periodic just after the decimal point, repeating the single digit "3" forever, i.e. 0.333.... A more complicated example is , whose decimal becomes periodic at the ''second'' digit following the decimal point and then repeats the sequence "144" forever, i.e. 5.8144144144.... Another example of this is , which becomes periodic after the decimal point, repeating the 13-digit pattern "1886792452830" forever, i.e. 11.18867924528301886792452830.... T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1729 (number)
1729 is the natural number following 1728 and preceding 1730. It is the first nontrivial taxicab number, expressed as the sum of two cubic positive integers in two different ways. It is known as the Ramanujan number or Hardy–Ramanujan number after G. H. Hardy and Srinivasa Ramanujan. As a natural number 1729 is composite, the squarefree product of three prime numbers 7 × 13 × 19. It has as factors 1, 7, 13, 19, 91, 133, 247, and 1729. It is the third Carmichael number, and the first Chernick–Carmichael number. Furthermore, it is the first in the family of absolute Euler pseudoprimes, a subset of Carmichael numbers. 1729 is divisible by 19, the sum of its digits, making it a harshad number in base 10. 1729 is the dimension of the Fourier transform on which the fastest known algorithm for multiplying two numbers is based. This is an example of a galactic algorithm. 1729 can be expressed as the quadratic form. Investigating pairs of its distinct integer-valu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1458 (number)
1458 is the integer after 1457 and before 1459. The maximum determinant of an 11 by 11 matrix of zeroes and ones is 1458. 1458 is one of three numbers which, when its base 10 digits are added together, produces a sum which, when multiplied by its reversed self, yields the original number: : 1 + 4 + 5 + 8 = 18 : 18 × 81 = 1458 The only other non-trivial numbers with this property are 81 and 1729 Events January–March * January 8 – Frederick, the eldest son of King George II of Great Britain is made Prince of Wales at the age of 21, a few months after he comes to Britain for the first time after growing up in Hanover ..., as well as the trivial solutions 1 and 0. It was proven by Masahiko Fujiwara. References Integers {{Num-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
