ORCID Profile
0000-0001-9551-2903
Current Organisation
Radboud Universiteit Nijmegen
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Pure Mathematics | Algebra and Number Theory | Combinatorics and Discrete Mathematics (excl. Physical Combinatorics) | Mathematical Aspects of Classical Mechanics, Quantum Mechanics and Quantum Information Theory | Pure Mathematics not elsewhere classified | Numerical and Computational Mathematics not elsewhere classified
Expanding Knowledge in the Mathematical Sciences | Expanding Knowledge in the Physical Sciences |
Publisher: Wiley
Date: 10-12-2009
Publisher: Steklov Mathematical Institute
Date: 31-08-2002
Publisher: International Press of Boston
Date: 2008
Publisher: Springer Science and Business Media LLC
Date: 30-10-2010
Publisher: Springer Science and Business Media LLC
Date: 08-2003
Publisher: Springer Science and Business Media LLC
Date: 02-1997
DOI: 10.1007/BF02355735
Publisher: Springer Science and Business Media LLC
Date: 09-03-2020
DOI: 10.1007/S00025-020-1168-7
Abstract: We give a q -congruence whose specializations $$q=-1$$ q = - 1 and $$q=1$$ q = 1 correspond to supercongruences (B.2) and (H.2) on Van Hamme’s list (in: p -Adic Functional Analysis (Nijmegen, 1996), Lecture Notes in Pure and Applied Mathematics, vol 192. Dekker, New York, pp 223–236, 1997): $$\\begin{aligned}& \\sum _{k=0}^{(p-1)/2}(-1)^k(4k+1)A_k\\equiv p(-1)^{(p-1)/2}\\ ({\\text {mod}}p^3) \\quad \\text {and}\\quad \\\\& \\sum _{k=0}^{(p-1)/2}A_k\\equiv a(p)\\ ({\\text {mod}}p^2), \\end{aligned}$$ ∑ k = 0 ( p - 1 ) / 2 ( - 1 ) k ( 4 k + 1 ) A k ≡ p ( - 1 ) ( p - 1 ) / 2 ( mod p 3 ) and ∑ k = 0 ( p - 1 ) / 2 A k ≡ a ( p ) ( mod p 2 ) , where $$p $$ p 2 is prime, $$\\begin{aligned} A_k=\\prod _{j=0}^{k-1}\\biggl (\\frac{1/2+j}{1+j}\\biggr )^3=\\frac{1}{2^{6k}}{\\left( {\\begin{array}{c}2k\\\\ k\\end{array}}\\right) }^3 \\quad \\text {for}\\ k=0,1,2,\\ldots , \\end{aligned}$$ A k = ∏ j = 0 k - 1 ( 1 / 2 + j 1 + j ) 3 = 1 2 6 k 2 k k 3 for k = 0 , 1 , 2 , … , and a ( p ) is the p th coefficient of the modular form $$q\\prod _{j=1}^\\infty (1-q^{4j})^6$$ q ∏ j = 1 ∞ ( 1 - q 4 j ) 6 (of weight 3). We complement our result with a general common q -congruence for related hypergeometric sums.
Publisher: Steklov Mathematical Institute
Date: 31-08-2005
Publisher: Springer Science and Business Media LLC
Date: 28-09-2018
Publisher: Elsevier BV
Date: 04-2012
Publisher: Steklov Mathematical Institute
Date: 1996
DOI: 10.4213/SM178
Publisher: Institute of Mathematics, Polish Academy of Sciences
Date: 2009
DOI: 10.4064/AA136-3-4
Publisher: Steklov Mathematical Institute
Date: 31-12-2013
Publisher: Springer New York
Date: 2013
Publisher: Springer Science and Business Media LLC
Date: 12-2003
Publisher: Steklov Mathematical Institute
Date: 2013
DOI: 10.4213/RM9564
Publisher: Elsevier BV
Date: 05-2018
Publisher: Steklov Mathematical Institute
Date: 2001
DOI: 10.4213/MZM759
Publisher: American Mathematical Society (AMS)
Date: 03-2012
Publisher: Wiley
Date: 06-11-2018
DOI: 10.1002/HON.2562
Abstract: Despite antiretroviral therapy, HIV+ in iduals still have increased risk to develop lymphomas, including marginal zone lymphomas, suggesting that factors other than HIV-related immunosuppression are probably acting as lymphomagenic factors in the HIV setting. The possible pathogenic involvement of HIV p17 protein variants was investigated in a particularly informative case of HIV-related splenic marginal zone lymphoma, which was negative for oncogenic virus infections, thus allowing us to assess the possible direct contribution of these HIV-encoded proteins to lymphomagenesis. The presence of p17 protein was analyzed by immunohistochemistry in lymphoma tissue. Recombinant p17 protein derived from the dominant sequence detected in plasma and lymphoma biopsy was characterized for B-cell proliferation, clonogenicity in soft agar, in vitro tube formation and wound healing. Intracellular signaling was investigated by immunoblotting. HIV p17 protein was detected in reactive lymphoid follicles but not within lymphoma cells. An identical dominant variant p17 sequence, p17-Lyrm, carrying a 117 to 118 Ala-Ala insertion was detected in both plasma and lymphoma tissue. Recombinant p17-Lyrm enhanced B-cell proliferation and clonogenicity promoted the formation of capillary-like structures and enhanced endothelial cell migration. Unlike reference p17, the p17-Lyrm variant enhanced the activation of Akt and ERK, critical kinases in lymphomagenesis. p17-Lyrm clonogenic activity was dependent on the activation of Akt but not of ERK1/2. These results indicated that HIV p17 variants with distinct molecular signatures and functional properties may accumulate in lymphoid tissues of HIV-infected in iduals where they may act as a local stimulus promoting the development of lymphomas.
Publisher: Pleiades Publishing Ltd
Date: 10-2010
Publisher: Springer Science and Business Media LLC
Date: 29-06-2012
Publisher: Wiley
Date: 23-01-2012
DOI: 10.1112/S0010437X11007342
Abstract: We prove the conjectural relations between Mahler measures and L -values of elliptic curves of conductors 20 and 24. We also present new hypergeometric expressions for L -values of elliptic curves of conductors 27 and 36. Furthermore, we prove a new functional equation for the Mahler measure of the polynomial family (1+ X ) (1+ Y )( X + Y )− αXY , α ∈ℝ.
Publisher: American Mathematical Society
Date: 2010
Publisher: Steklov Mathematical Institute
Date: 30-04-2011
Publisher: Elsevier BV
Date: 12-2009
Publisher: Cambridge University Press (CUP)
Date: 19-07-2018
DOI: 10.1017/S0004972718000503
Abstract: We prove new integral representations of the approximation forms in zeta values.
Publisher: Cambridge University Press (CUP)
Date: 27-12-2018
DOI: 10.1017/S144678871800037X
Abstract: We record $\\binom{42}{2}+\\binom{23}{2}+\\binom{13}{2}=1192$ functional identities that, apart from being amazingly amusing in themselves, find application in the derivation of Ramanujan-type formulas for $1/\\unicode[STIX]{x1D70B}$ and in the computation of mathematical constants.
Publisher: Elsevier BV
Date: 07-2019
Publisher: Canadian Mathematical Society
Date: 16-07-0003
Abstract: We obtain lower estimates for the absolute values of linear forms of the values of generalized Heine series at non-zero points of an imaginary quadratic field II, in particular of the values of q -exponential function. These estimates depend on the in idual coefficients, not only on the maximum of their absolute values. The proof uses a variant of classical Siegel's method applied to a system of functional Poincaré-type equations and the connection between the solutions of these functional equations and the generalized Heine series.
Publisher: Oxford University Press (OUP)
Date: 19-05-2015
DOI: 10.1093/IMRN/RNV139
Publisher: Cambridge University Press (CUP)
Date: 07-09-2021
DOI: 10.1017/S0004972721000654
Abstract: Motivated by a famous question of Lehmer about the Mahler measure, we study and solve its analytic analogue.
Publisher: Springer Berlin Heidelberg
Date: 2013
Publisher: Steklov Mathematical Institute
Date: 2007
DOI: 10.4213/RM6920
Publisher: Steklov Mathematical Institute
Date: 2001
DOI: 10.4213/RM427
Publisher: Steklov Mathematical Institute
Date: 2010
DOI: 10.4213/MZM8851
Publisher: Steklov Mathematical Institute
Date: 2003
DOI: 10.4213/MZM629
Publisher: Adam Mickiewicz University (Euclid)
Date: 12-2008
Publisher: Steklov Mathematical Institute
Date: 2002
DOI: 10.4213/RM542
Publisher: Steklov Mathematical Institute
Date: 2001
DOI: 10.4213/RM389
Publisher: Springer Science and Business Media LLC
Date: 10-2007
Publisher: Cambridge University Press (CUP)
Date: 22-03-2013
DOI: 10.1017/S0004972713000233
Abstract: We relate a one-parametric generating function for the squares of Legendre polynomials to an arithmetic hypergeometric series whose parametrisation by a level 7 modular function was recently given by Cooper. By using this modular parametrisation we resolve a subfamily of identities involving $1/ \\pi $ which was experimentally observed by Sun.
Publisher: Steklov Mathematical Institute
Date: 2007
DOI: 10.4213/MZM3676
Publisher: Springer Science and Business Media LLC
Date: 05-1997
DOI: 10.1007/BF02355088
Publisher: Springer Science and Business Media LLC
Date: 03-2004
Publisher: Steklov Mathematical Institute
Date: 2002
DOI: 10.4213/IM387
Publisher: Springer Science and Business Media LLC
Date: 06-2014
Publisher: World Scientific Pub Co Pte Lt
Date: 23-10-2020
DOI: 10.1142/S1793042120400230
Abstract: We illustrate the power of Experimental Mathematics and Symbolic Computation to suggest irrationality proofs of natural constants, and the determination of their irrationality measures. Sometimes such proofs can be fully automated, but sometimes there is still need for a human touch.
Publisher: Springer New York
Date: 2013
Publisher: Steklov Mathematical Institute
Date: 2007
DOI: 10.4213/RM6119
Publisher: Steklov Mathematical Institute
Date: 2004
DOI: 10.4213/MZM573
Publisher: Elsevier BV
Date: 06-2005
Publisher: Cellule MathDoc/CEDRAM
Date: 2003
DOI: 10.5802/JTNB.415
Publisher: Springer Science and Business Media LLC
Date: 14-07-2016
Publisher: Cambridge University Press (CUP)
Date: 30-03-2011
DOI: 10.1017/S0013091509000959
Abstract: We provide certain unusual generalizations of Clausen's and Orr's theorems for solutions of fourth-order and fifth-order generalized hypergeometric equations. As an application, we present several ex les of algebraic transformations of Calabi–Yau differential equations.
Publisher: Springer Science and Business Media LLC
Date: 08-2006
Publisher: Springer Science and Business Media LLC
Date: 02-03-2006
Publisher: Steklov Mathematical Institute
Date: 31-08-2001
Publisher: Steklov Mathematical Institute
Date: 2001
DOI: 10.4213/SM588
Publisher: Elsevier BV
Date: 10-2004
Publisher: Wiley
Date: 23-07-2004
Publisher: Canadian Mathematical Society
Date: 10-2012
Abstract: We study the densities of uniform random walks in the plane. A special focus is on the case of short walks with three or four steps and, less completely, those with five steps. As one of the main results, we obtain a hypergeometric representation of the density for four steps, which complements the classical elliptic representation in the case of three steps. It appears unrealistic to expect similar results for more than five steps. New results are also presented concerning the moments of uniform random walks and, in particular, their derivatives. Relations with Mahler measures are discussed.
Publisher: Springer Science and Business Media LLC
Date: 04-2002
Publisher: Steklov Mathematical Institute
Date: 31-08-2002
Publisher: Steklov Mathematical Institute
Date: 30-06-2007
Publisher: Steklov Mathematical Institute
Date: 30-04-2001
Publisher: Cellule MathDoc/CEDRAM
Date: 2004
DOI: 10.5802/JTNB.447
Publisher: Elsevier BV
Date: 09-2008
Publisher: Elsevier BV
Date: 06-2013
Publisher: Cambridge University Press (CUP)
Date: 30-05-2022
DOI: 10.1017/NMJ.2022.11
Abstract: A (folklore?) conjecture states that no holomorphic modular form $F(\\tau )=\\sum _{n=1}^{\\infty } a_nq^n\\in q\\mathbb Z[[q]]$ exists, where $q=e^{2\\pi i\\tau }$ , such that its anti-derivative $\\sum _{n=1}^{\\infty } a_nq^n/n$ has integral coefficients in the q -expansion. A recent observation of Broadhurst and Zudilin, rigorously accomplished by Li and Neururer, led to ex les of meromorphic modular forms possessing the integrality property. In this note, we investigate the arithmetic phenomenon from a systematic perspective and discuss related transcendental extensions of the differentially closed ring of quasi-modular forms.
Publisher: Steklov Mathematical Institute
Date: 1997
DOI: 10.4213/MZM1560
Publisher: Elsevier BV
Date: 10-2011
Publisher: Springer Science and Business Media LLC
Date: 10-2006
Publisher: Walter de Gruyter GmbH
Date: 13-01-2003
Publisher: Elsevier BV
Date: 07-2015
Publisher: Springer Science and Business Media LLC
Date: 02-12-2009
Publisher: Wiley
Date: 02-2012
DOI: 10.1112/BLMS/BDR019
Publisher: Steklov Mathematical Institute
Date: 2000
DOI: 10.4213/SM530
Publisher: Cambridge University Press (CUP)
Date: 19-01-2022
DOI: 10.1017/S0004972721001295
Abstract: For an (irreducible) recurrence equation with coefficients from $\\mathbb Z[n]$ and its two linearly independent rational solutions $u_n,v_n$ , the limit of $u_n/v_n$ as $n\\to \\infty $ , when it exists, is called the Apéry limit. We give a construction that realises certain quotients of L -values of elliptic curves as Apéry limits.
Publisher: Elsevier BV
Date: 12-2014
Publisher: Steklov Mathematical Institute
Date: 2004
DOI: 10.4213/MZM555
Publisher: Springer Vienna
Date: 2008
Publisher: Springer Science and Business Media LLC
Date: 31-03-2020
Publisher: Cambridge University Press (CUP)
Date: 02-01-2014
DOI: 10.1017/S0305004113000765
Abstract: We present a proof of the formula, due to Mellit and Brunault, which evaluates an integral of the regulator of two modular units to the value of the L -series of a modular form of weight 2 at s =2. Applications of the formula to computing Mahler measures are discussed.
Publisher: Steklov Mathematical Institute
Date: 2002
DOI: 10.4213/MZM673
Publisher: Springer Science and Business Media LLC
Date: 07-2004
Publisher: Steklov Mathematical Institute
Date: 1996
DOI: 10.4213/IM63
Publisher: Steklov Mathematical Institute
Date: 2002
DOI: 10.4213/MZM674
Publisher: Springer New York
Date: 2013
Publisher: Steklov Mathematical Institute
Date: 31-12-2001
Publisher: Cambridge University Press (CUP)
Date: 28-04-2005
Publisher: Steklov Mathematical Institute
Date: 30-04-1995
Publisher: Office of Scientific and Technical Information (OSTI)
Date: 26-06-2009
DOI: 10.2172/964375
Publisher: Cambridge University Press (CUP)
Date: 02-08-2023
DOI: 10.1017/S1446788723000083
Abstract: We prove general Dwork-type congruences for constant terms attached to tuples of Laurent polynomials. We apply this result to establishing arithmetic and p -adic analytic properties of functions originating from polynomial solutions modulo $p^s$ of hypergeometric and Knizhnik–Zamolodchikov (KZ) equations, solutions which come as coefficients of master polynomials and whose coefficients are integers. As an application, we show that the simplest ex le of a p -adic KZ connection has an invariant line subbundle while its complex analog has no nontrivial subbundles due to the irreducibility of its monodromy representation.
Publisher: Steklov Mathematical Institute
Date: 2005
DOI: 10.4213/SM1376
Publisher: Springer Science and Business Media LLC
Date: 12-1996
DOI: 10.1007/BF02305156
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Taylor & Francis
Date: 21-03-2013
DOI: 10.1201/B13826-60
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Walter de Gruyter GmbH
Date: 02-07-2015
Abstract: We establish the linear independence over ℚ \\mathbb{Q} , in both qualitative and quantitative forms, of the four numbers 1, Li 1 ( 1 / z ) = - log ( 1 - 1 / z ) \\operatorname{Li}_{1}(1/z)=-\\log(1-1/z) , Li 2 ( 1 / z ) \\operatorname{Li}_{2}(1/z) and Li 2 ( 1 / ( 1 - z ) ) \\operatorname{Li}_{2}(1/(1-z)) , for all integers z ≥ 9 z\\geq 9 or z ≤ - 8 z\\leq-8 and for rationals z = s / r z=s/r or z = 1 - s / r z=1-s/r with 1 r s 1 r s , where s is large in comparison with r .
Publisher: Oxford University Press (OUP)
Date: 16-01-2013
DOI: 10.1093/IMRN/RNS285
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Informa UK Limited
Date: 23-04-2018
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Steklov Mathematical Institute
Date: 30-06-2002
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Institute of Mathematics, Polish Academy of Sciences
Date: 2004
DOI: 10.4064/AA111-2-4
Publisher: Cambridge University Press (CUP)
Date: 28-03-2018
DOI: 10.1017/S0004972717001411
Abstract: In this paper, we prove some conjectures of K. Stolarsky concerning the first and third moments of the Beatty sequences with the golden section and its square.
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Cellule MathDoc/CEDRAM
Date: 2007
DOI: 10.5802/JTNB.588
Publisher: Steklov Mathematical Institute
Date: 2001
DOI: 10.4213/RM460
Publisher: Steklov Mathematical Institute
Date: 2001
DOI: 10.4213/IM345
Publisher: Informa UK Limited
Date: 21-05-2020
Publisher: American Mathematical Society (AMS)
Date: 04-11-2014
Publisher: SIGMA (Symmetry, Integrability and Geometry: Methods and Application)
Date: 17-12-2015
Publisher: Steklov Mathematical Institute
Date: 31-08-2001
Publisher: Cambridge University Press (CUP)
Date: 18-02-2019
DOI: 10.1017/S1446788718000186
Abstract: In a recent study of how the output voltage of a Hall plate is affected by the shape of the plate and the size of its contacts, U. Ausserlechner has come up with a remarkable double integral that can be viewed as a generalisation of the classical elliptic ‘arithmetic–geometric mean (AGM)’ integral. Here we discuss transformation properties of the integral, which were experimentally observed by Ausserlechner, as well as its analytical and arithmetic features including connections with modular forms.
Publisher: American Mathematical Society (AMS)
Date: 05-2011
Publisher: Elsevier BV
Date: 08-2009
Publisher: Elsevier BV
Date: 02-2021
Publisher: Steklov Mathematical Institute
Date: 28-02-1996
Publisher: Steklov Mathematical Institute
Date: 31-12-2000
Publisher: Wiley
Date: 29-01-2016
DOI: 10.1112/JLMS/JDV073
Publisher: Elsevier BV
Date: 05-2007
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Steklov Mathematical Institute
Date: 2002
DOI: 10.4213/SM674
Publisher: Steklov Mathematical Institute
Date: 31-08-2001
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Steklov Mathematical Institute
Date: 28-02-2007
Publisher: Cambridge University Press
Date: 03-07-2014
Publisher: Steklov Mathematical Institute
Date: 2002
DOI: 10.4213/MZM375
Publisher: Steklov Mathematical Institute
Date: 2003
DOI: 10.4213/RM592
Publisher: Cambridge University Press
Date: 03-07-2009
Abstract: Despite their classical nature, continued fractions are a neverending research area, with a body of results accessible enough to suit a wide audience, from researchers to students and even amateur enthusiasts. Neverending Fractions brings these results together, offering fresh perspectives on a mature subject. Beginning with a standard introduction to continued fractions, the book covers a erse range of topics, from elementary and metric properties, to quadratic irrationals, to more exotic topics such as folded continued fractions and Somos sequences. Along the way, the authors reveal some amazing applications of the theory to seemingly unrelated problems in number theory. Previously scattered throughout the literature, these applications are brought together in this volume for the first time. A wide variety of exercises guide readers through the material, which will be especially helpful to readers using the book for self-study, and the authors also provide many pointers to the literature.
Publisher: Steklov Mathematical Institute
Date: 31-12-1996
Publisher: Steklov Mathematical Institute
Date: 2011
DOI: 10.4213/RM9420
Publisher: Steklov Mathematical Institute
Date: 28-02-2003
Publisher: Springer Science and Business Media LLC
Date: 14-06-2012
Publisher: American Mathematical Society (AMS)
Date: 20-12-2005
DOI: 10.1090/S0025-5718-05-01812-0
Abstract: The three main methods used in diophantine analysis of q q -series are combined to obtain new upper bounds for irrationality measures of the values of the q q -logarithm function \[ ln q ( 1 − z ) = ∑ ν = 1 ∞ z ν q ν 1 − q ν , | z | ⩽ 1 , \ln _{q}(1-z)=\sum _{\nu =1}^{\infty }\frac {z^{\nu }q^{\nu }}{1-q^{\nu }}, \qquad |z|\leqslant 1, \] when p = 1 / q ∈ Z ∖ { 0 , ± 1 } p=1/q\in \mathbb {Z}\setminus \{0,\pm 1\} and z ∈ Q z\in \mathbb {Q} .
Publisher: Routledge
Date: 28-09-2017
Publisher: Elsevier BV
Date: 2016
Publisher: Pleiades Publishing Ltd
Date: 04-2007
Publisher: Steklov Mathematical Institute
Date: 1997
DOI: 10.4213/MZM1503
Publisher: Steklov Mathematical Institute
Date: 1996
DOI: 10.4213/MZM1903
Publisher: American Mathematical Society
Date: 2010
Start Date: 2014
End Date: 04-2017
Amount: $340,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2011
End Date: 05-2014
Amount: $255,000.00
Funder: Australian Research Council
View Funded Activity