Download e-book for iPad: A Panorama of Number Theory or The View from Baker's Garden by Gisbert Wüstholz

By Gisbert Wüstholz

Alan Baker's sixtieth birthday in August 1999 provided a great chance to arrange a convention at ETH Zurich with the objective of providing the state-of-the-art in quantity thought and geometry. a number of the leaders within the topic have been introduced jointly to give an account of analysis within the final century in addition to speculations for attainable additional learn. The papers during this quantity hide a extensive spectrum of quantity concept together with geometric, algebrao-geometric and analytic facets. This quantity will entice quantity theorists, algebraic geometers, and geometers with a bunch theoretic heritage. even if, it is going to even be precious for mathematicians (in specific study scholars) who're attracted to being proficient within the kingdom of quantity idea before everything of the twenty first century and in attainable advancements for the longer term.

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I. Fel’dman obtained a Diophantine approximation measure of an elliptic logarithm by an algebraic number. Precisely, it concerns the case k = 1, u := u 1 = 0 in our above notation. Let B be a real number ≥ 3. He proved that there exists an effective constant c > 0 which is independent of B such that for any β ∈ Q with‡ h(β) ≤ log B we have log |u − β| ≥ − log B · exp{c(log log B)1/2 }; he refined the estimate for a non-zero period u ∈ := 1 to obtain log |u − β| ≥ −c · log B · (log log B)4 . The case of a quotient of two non-zero elliptic logarithms was also treated by him (see Feldman 1951, 1958, 1968) (in fact, he used a classical height, but it can be translated to the logarithmic height; see the relation between various heights in Waldschmidt 1979).

Let Q Report on p-adic Logarithmic Forms 13 ¯ p with respect to the valuation of Q ¯ p, of Q p and let C p be the completion of Q which is the unique extension of the valuation | | p of Q p . According to Hasse (1980), pp. 298–302, we can embed K ℘ into C p : there exists a Q-isomorphism ¯ p such that K ℘ is value-isomorphic to Q p σ (K ) , whence we σ from K into Q can identify K ℘ with Q p σ (K ) . We note that if we formulate estimates for p-adic logarithmic forms as a lower bound for | | p with = b1 log p α1 + · · · + bn log p αn , where log p α j signifies the p-adic logarithm of α j defined in K ℘ by log p α j = ∞ k=1 (−1)k−1 (α j − 1)k , k then it demands, a priori, |α j − 1| p < 1.

Math. Trans. Ser. 2, 59, (1966), 246–270). I. (1958), Simultaneous approximation of the periods of an elliptic function by algebraic numbers, Izv. Akad. Nauk. SSSR, Ser. Mat. 22, 563–576; English translation in Amer. Math. Trans. Ser. 2, 59, (1966), 271– 284). I. O. Gel’fond, Trudy. Moskov 18, 65–76; English translation in Trans. Moscow Math. Soc. 18, (1968), 71–84). Hirata-Kohno, N. (1990), Formes lin´eaires d’int´egrales elliptiques, in S´em. de Th´eorie des Nombres, Paris, 1988/89, C. Goldstein (ed).

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