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Fonction sommatoire de la fonction de Möbius, 3. Majorations asymptotiques effectives fortes

M. El Marraki (1995)

Journal de théorie des nombres de Bordeaux

On établit les majorations M ( x ) 0 . 002969 x ( log x ) 1 / 2 , valable pour x 142194 , M ( x ) 0 . 6437752 x log x qui est la meilleure majoration possible en x log x valable pour tout x > 1 ( M ( 5 ) = 2 = 0 . 6437752 × 5 log 5 ) , et d’autres analogues. On montre enfin comment trouver des majorations effectives M ( x ) > c k x ( log log x ) 2 k ( log x ) k pour tout k .

Fundamental units in a family of cubic fields

Veikko Ennola (2004)

Journal de Théorie des Nombres de Bordeaux

Let 𝒪 be the maximal order of the cubic field generated by a zero ε of x 3 + ( - 1 ) x 2 - x - 1 for , 3 . We prove that ε , ε - 1 is a fundamental pair of units for 𝒪 , if [ 𝒪 : [ ε ] ] / 3 .

Generalized Staircases: Recurrence and Symmetry

W. Patrick Hooper, Barak Weiss (2012)

Annales de l’institut Fourier

We study infinite translation surfaces which are -covers of compact translation surfaces. We obtain conditions ensuring that such surfaces have Veech groups which are Fuchsian of the first kind and give a necessary and sufficient condition for recurrence of their straight-line flows. Extending results of Hubert and Schmithüsen, we provide examples of infinite non-arithmetic lattice surfaces, as well as surfaces with infinitely generated Veech groups.

GiANT: Graphical Algebraic Number Theory

Aneesh Karve, Sebastian Pauli (2006)

Journal de Théorie des Nombres de Bordeaux

While most algebra is done by writing text and formulas, diagrams have always been used to present structural information clearly and concisely. Text shells are the de facto interface for computational algebraic number theory, but they are incapable of presenting structural information graphically. We present GiANT, a newly developed graphical interface for working with number fields. GiANT offers interactive diagrams, drag-and-drop functionality, and typeset formulas.

Hierarchical residue number systems with small moduli and simple converters

Tadeusz Tomczak (2011)

International Journal of Applied Mathematics and Computer Science

In this paper, a new class of Hierarchical Residue Number Systems (HRNSs) is proposed, where the numbers are represented as a set of residues modulo factors of 2k ± 1 and modulo 2k . The converters between the proposed HRNS and the positional binary number system can be built as 2-level structures using efficient circuits designed for the RNS (2k-1, 2k, 2k+1). This approach allows using many small moduli in arithmetic channels without large conversion overhead. The advantages resulting from the...

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