|
Dini Surface
Dini may refer to: Organizations *National Directorate of Intelligence (Peru), the primary intelligence agency in Peru Places in Iran * Ala ol Dini-ye Olya, a village in Eslamabad Rural District, in the Central District of Jiroft County, Kerman Province * Nur ol Dini,a village in Kheyrgu Rural District, Alamarvdasht District, Lamerd County, Fars Province * Tang-e Baha ol Dini, a village in Howmeh Rural District, in the Central District of Larestan County, Fars Province * Tolombeh-ye Rokn ol Dini, a village in Arzuiyeh Rural District, in the Central District of Arzuiyeh County, Kerman Province * Zeyn ol Dini, a village in Kal Rural District, Eshkanan District, Lamerd County, Fars Province People *Abdi Dini (born 1981), professional Canadian wheelchair basketball player *Abdulkadir Sheikh Dini, Somali politician and military officia *Ahmed Dini Ahmed (1932-2004), Djiboutian politician * Andrea Dini (born 1996), Italian football player * Antonio Dini (1918–1940), New Zealand f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Directorate Of Intelligence (Peru)
The National Directorate of Intelligence ( es, Dirección Nacional de Inteligencia), or (DINI), is the premier intelligence agency in Peru. The agency is responsible for national, Military intelligence, military and police intelligence, as well as counterintelligence. History On 27 January 1960, the National Intelligence Service (Peru), National Intelligence Service (SIN) was established. Following the presidency of Alberto Fujimori and controversies surrounding SIN, the agency was "deactivated" in November 2000. Under the regulation of Supreme Decree Nº 025-2006-PCM of 4 January 2006, the National Directorate of Intelligence (DINI) was established. References {{National intelligence agencies Domestic intelligence agencies Law enforcement in Peru 2006 establishments in Peru Government agencies of Peru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mohamed Dini Farah
Mohamed Dini Farah ( so, Maxamed Diini Faarax) (born 1943.) is a Djiboutian politician. He is a former minister and President of the Parliamentary Group of the People's Rally for Progress (RPP), currently serving as a deputy in the National Assembly of Djibouti. Farah was born in Tadjourah. He was Minister of the Civil Service and Administrative Reform from 8 June 1995 to 19 April 1997, then Minister of Public Works."Djibouti: new government formed", AFP (nl.newsbank.com), 28 December 1997. Farah was elected to the National Assembly in the December 1997 parliamentary election as the second candidate on the joint candidate list of the RPP and the Front for the Restoration of Unity and Democracy (FRUD) in Tadjourah Region. Following this election, he was appointed as Minister of Justice, in charge of Human Rights, on 28 December 1997. Farah was subsequently appointed as Minister of Health on 12 May 1999. He was re-elected in the January 2003 parliamentary election as the second ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dini–Lipschitz Criterion
In mathematics, the Dini–Lipschitz criterion is a sufficient condition for the Fourier series of a periodic function to converge uniformly at all real numbers. It was introduced by , as a strengthening of a weaker criterion introduced by . The criterion states that the Fourier series of a periodic function ''f'' converges uniformly on the real line if :\lim_\omega(\delta,f)\log(\delta)=0 where \omega is the modulus of continuity In mathematical analysis, a modulus of continuity is a function ω : , ∞→ , ∞used to measure quantitatively the uniform continuity of functions. So, a function ''f'' : ''I'' → R admits ω as a modulus of continuity if and only if :, f(x)-f ... of ''f'' with respect to \delta. References * * {{DEFAULTSORT:Dini-Lipschitz criterion Fourier series Theorems in Fourier analysis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dini Continuity
In mathematical analysis, Dini continuity is a refinement of continuity. Every Dini continuous function is continuous. Every Lipschitz continuous function is Dini continuous. Definition Let X be a compact subset of a metric space (such as \mathbb^n), and let f:X\rightarrow X be a function from X into itself. The modulus of continuity of f is :\omega_f(t) = \sup_ d(f(x),f(y)). The function f is called Dini-continuous if :\int_0^1 \frac\,dt < \infty. An equivalent condition is that, for any , : where is the of . See also * |
Dini's Surface
In geometry, Dini's surface is a surface with constant negative curvature that can be created by twisting a pseudosphere. It is named after Ulisse Dini and described by the following parametric equations: : \begin x&=a \cos u \sin v \\ y&=a \sin u \sin v \\ z&=a \left(\cos v +\ln \tan \frac \right) + bu \end Another description is a generalized helicoid constructed from the tractrix In geometry, a tractrix (; plural: tractrices) is the curve along which an object moves, under the influence of friction, when pulled on a horizontal plane by a line segment attached to a pulling point (the ''tractor'') that moves at a right angl .... See also * Breather surface References {{reflist Surfaces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dini Criterion
In mathematics, Dini's criterion is a condition for the pointwise convergence of Fourier series, introduced by . Statement Dini's criterion states that if a periodic function ' has the property that (f(t)+f(-t))/t is locally integrable In mathematics, a locally integrable function (sometimes also called locally summable function) is a function which is integrable (so its integral is finite) on every compact subset of its domain of definition. The importance of such functions li ... near , then the Fourier series of converges to 0 at t=0. Dini's criterion is in some sense as strong as possible: if is a positive continuous function such that is not locally integrable near , there is a continuous function ' with , , ≤ whose Fourier series does not converge at . References * *{{SpringerEOM, id=Dini_criterion&oldid=28457, title=Dini criterion, first=B. I., last= Golubov Fourier series ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dini's Theorem
In the mathematical field of analysis, Dini's theorem says that if a monotone sequence of continuous functions converges pointwise on a compact space and if the limit function is also continuous, then the convergence is uniform. Formal statement If X is a compact topological space, and (f_n)_ is a monotonically increasing sequence (meaning f_n(x)\leq f_(x) for all n\in\mathbb and x\in X) of continuous real-valued functions on X which converges pointwise to a continuous function f\colon X\to \mathbb, then the convergence is uniform. The same conclusion holds if (f_n)_ is monotonically decreasing instead of increasing. The theorem is named after Ulisse Dini.According to , "his theoremis called Dini's theorem because Ulisse Dini (1845–1918) presented the original version of it in his book on the theory of functions of a real variable, published in Pisa in 1878". This is one of the few situations in mathematics where pointwise convergence implies uniform convergence; the key is the gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dini Test
In mathematics, the Dini and Dini–Lipschitz tests are highly precise tests that can be used to prove that the Fourier series of a function converges at a given point. These tests are named after Ulisse Dini and Rudolf Lipschitz. Definition Let be a function on ,2 let be some point and let be a positive number. We define the local modulus of continuity at the point by :\left.\right.\omega_f(\delta;t)=\max_ , f(t)-f(t+\varepsilon), Notice that we consider here to be a periodic function, e.g. if and is negative then we define . The global modulus of continuity (or simply the modulus of continuity) is defined by :\omega_f(\delta) = \max_t \omega_f(\delta;t) With these definitions we may state the main results: :Theorem (Dini's test): Assume a function satisfies at a point that ::\int_0^\pi \frac\omega_f(\delta;t)\,\mathrm\delta < \infty. :Then the Fourier series of converges at to . For example, the theorem holds with but does not hold with . :Theorem ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dini Derivative
In mathematics and, specifically, real analysis, the Dini derivatives (or Dini derivates) are a class of generalizations of the derivative. They were introduced by Ulisse Dini, who studied continuous but nondifferentiable functions. The upper Dini derivative, which is also called an upper right-hand derivative, of a continuous function :f: \rightarrow , is denoted by and defined by :f'_+(t) = \limsup_ \frac, where is the supremum limit and the limit is a one-sided limit. The lower Dini derivative, , is defined by :f'_-(t) = \liminf_ \frac, where is the infimum limit. If is defined on a vector space, then the upper Dini derivative at in the direction is defined by :f'_+ (t,d) = \limsup_ \frac. If is locally Lipschitz, then is finite. If is differentiable at , then the Dini derivative at is the usual derivative at . Remarks * The functions are defined in terms of the infimum and supremum in order to make the Dini derivatives as "bullet proof" as possible, so that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulisse Dini
Ulisse Dini (14 November 1845 – 28 October 1918) was an Italian mathematician and politician, born in Pisa. He is known for his contribution to real analysis, partly collected in his book "''Fondamenti per la teorica delle funzioni di variabili reali''". Life and academic career Dini attended the Scuola Normale Superiore in order to become a teacher. One of his professors was Enrico Betti. In 1865, a scholarship enabled him to visit Paris, where he studied under Charles Hermite as well as Joseph Bertrand, and published several papers. In 1866, he was appointed to the University of Pisa, where he taught algebra and geodesy. In 1871, he succeeded Betti as professor for analysis and geometry. From 1888 until 1890, Dini was ''rettore'' of the Pisa University, and of the ''Scuola Normale Superiore'' from 1908 until his death in 1918. He was also active as a politician: in 1871 he was voted into the Pisa city council, and in 1880, he became a member of the Italian parliament. Hono ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandra Dini
Sandra Dini (born 1 January 1958 in Florence) is a retired Italian high jumper. Biography She finished eleventh at the 1981 European Indoor Championships. She became Italian champion in 1981 and 1984. Her personal best jump was , achieved in June 1981 in Udine. National titles In the ''"Sara Simeoni era"'', Sandra Dini has won 4 times the individual national championship. *2 wins in high jump The high jump is a track and field event in which competitors must jump unaided over a horizontal bar placed at measured heights without dislodging it. In its modern, most-practiced format, a bar is placed between two standards with a crash mat f ... (1981, 1984) *2 wins in high jump indoor (1982, 1985) See also * Italian all-time top lists - High jump References External links * Athlete profileat All-athletics.com {{DEFAULTSORT:Dini, Sandra 1958 births Living people Italian female high jumpers Athletes from Florence Mediterranean Games bronze medalists for Italy Athletes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Putu Dini Jasita Utami
Putu Dini Jasita Utami (born 8 January 1994) is an Indonesian beach volleyball player. Born in Gianyar, Bali, Utami now reside in Lombok, West Nusa Tenggara. As a beach volleyball player, Utami teamed-up with Dhita Juliana since 2011. Juliana and Utami won the gold medal for the West Nusa Tenggara province at the 2012 Pekan Olahraga Nasional held in Riau. In the international event, she and Juliana was the gold medalist at the 2013 Islamic Solidarity Games. She also won the bronze medal at the 2014 Asian Beach Games in Phuket, Thailand. In 2018, she claimed the bronze medal at the Asian Games. Utami graduated in the sports science Sports science is a discipline that studies how the healthy human body works during exercise, and how sport and physical activity promote health and performance from cellular to whole body perspectives. The study of sports science traditionally inc ... discipline at the IKIP Mataram in 2017. References External links * * 1994 births Living peop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
