On rational approximations of algebraic numbers .
Tasoev, B.G. (2001)
Vladikavkazskiĭ Matematicheskiĭ Zhurnal
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Tasoev, B.G. (2001)
Vladikavkazskiĭ Matematicheskiĭ Zhurnal
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M. Skwarczyński (1976)
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J. Achari (1978)
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James F. Davis, R.J. Milgram (1991)
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Matusevich, Laura Felicia (2000)
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J. Achari (1979)
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Eric Schmutz (2008)
Open Mathematics
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It is known that the unit sphere, centered at the origin in ℝn, has a dense set of points with rational coordinates. We give an elementary proof of this fact that includes explicit bounds on the complexity of the coordinates: for every point ν on the unit sphere in ℝn, and every ν > 0; there is a point r = (r 1; r 2;…;r n) such that: ⊎ ‖r-v‖∞ < ε.⊎ r is also a point on the unit sphere; Σ r i 2 = 1.⊎ r has rational coordinates; for some integers a i, b i.⊎ for all . One consequence...
J. Siciak (1962)
Annales Polonici Mathematici
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Krystyna Ziętak (1974)
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Jacinto González Pachón, Sixto Ríos-Insua (1992)
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We consider the multiobjective decision making problem. The decision maker's (DM) impossibility to take consciously a preference or indifference attitude with regard to a pair of alternatives leads us to what we have called doubt attitude. So, the doubt may be revealed in a conscient way by the DM. However, it may appear in an inconscient way, revealing judgements about her/his attitudes which do not follow a certain logical reasoning. In this paper, doubt will be considered...
Masahiro Yasumoto (1994)
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J. Bochnak, W. Kucharz (2003)
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Let X be a nonsingular complex algebraic curve and let Y be a nonsingular rational complex algebraic surface. Given a compact subset K of X, every holomorphic map from a neighborhood of K in X into Y can be approximated by rational maps from X into Y having no poles in K. If Y is a nonsingular projective complex surface with the first Betti number nonzero, then such an approximation is impossible.
W. Szafrański (1983)
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Pascale Roesch (2012)
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