CNTA 2016 (June 20-24, 2016)
14th Meeting of the Canadian Number Theory Association (CNTA XIV) - University of Calgary

Full Conference Program (PDF)
8:00–9:30 | ST Foyer | Registration |
9:00–9:30 | ST 148 | Opening remarks |
9:30–10:30 | ST 148 | Lillian Pierce, Hausdorff Center Bonn and Duke University On p-torsion in class groups of number fields |
10:30–11:00 | ST Foyer | Coffee break |
11:00–11:30 | ST 140 | Jeff Achter, Colorado State University Descending cohomology geometrially, or, the quest for the phantom |
ST 148 | Ram Murty, Queens University Twin primes and the parity problem |
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11:35–12:05 | ST 140 | Lassina Dembele, University of Warwick On the existence of abelian surfaces with everywhere good reduction |
ST 148 | Tristan Freiberg, University of Waterloo Sums of two squares in tuples |
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12:05-13:45 | Lunch break | |
13:45–14:45 | ST 148 | Nils Bruin, Simon Fraser University Computation of obstructions to rational points on curves |
14:45–15:15 | ST Foyer | Coffee break and registration |
15:15–15:45 | ST 140 | Anne-Marie Aubert, Institut de Mathematiques de Jussieu A decomposition of the set of enhanced Langlands parameters for a p-adic reductive group |
ST 148 | Cameron Stewart, University of Waterloo On the representation of integers by binary forms |
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15:45–16:00 | Break | |
16:00–16:15 | ST 128 | Robert Harron, University of Hawai’i Manoa Equidistribution of shapes of cubic fields of fixed quadratic resolvent |
ST 135 | Sumit Giri, CRM Montreal Average distribution of a prime counting function for a large family of elliptic curves |
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ST 143 | Alan Filipin, University of Zagreb On the existence of Diophantine quintuples |
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ST 145 | Paula Chaves, Universidade Federal de Goias On the sum of powers of terms of a linear recurrence sequence |
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16:20–16:35 | ST 128 | Chad Davis, University of British Columbia Okanagan The index of a quartic field defined by a trinomial X4+aX+ b |
ST 135 | James Parks, KTH, Royal Institute of Technology On the Lang-Trotter conjecture for two elliptic curves |
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ST 143 | Kevser Aktas, Gazi University Existence of Diophantine m-tuples in Gaussian primes |
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ST 145 | J C Saunders, University of Waterloo Random Fibonacci Sequences |
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16:40–16:55 | ST 128 | Piper Harron, The Liberated Mathematician The equidistribution of lattice shapes of rings of integers in cubic, quartic, and quintic number fields |
ST 135 | Amir Akbary, University of Lethbridge Some results on elliptic nets |
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ST 143 | Eva Goedhardt, Smith College Solving the Family of Diophantine Equations X2N+ 4Y2=Z5 |
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ST 145 | Goldwyn Millar, Carleton University Character values of the Sidelnikov-Lempel-Cohn-Eastman sequences |
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16:55–17:10 | Break | |
17:10–17:25 | ST 128 | Andrew Shallue, Illinois Wesleyan University New ideas for tabulating Baille-PSW pseudoprimes |
ST 135 | Andreas Weingartner, Southern Utah University A sieve problem and its application |
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ST 143 | Natalia Garcia-Fritz, University of Toronto Curves of low genus and applications to Diophantine problems |
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ST 145 | Bret Nasserden, Simon Fraser University On the construction of genus 2 curves with a full level 3 structure |
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17:30–17:45 | ST 128 | Jonathan Sorenson, Butler University Two compact incremental prime sieves |
ST 135 | Sneha Chauby, University of Illinois Urbana-Champaign Pair correlation of fractional parts derived from rationl valued sequences |
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ST 143 | Samuele Anni, University of Warwick Semistable elliptic curves over totally real fields and Diophantine equations |
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ST 145 | Adam Logan, Government of Canada New rigid Calabi-Yau threefolds from φ4theory |
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17:50–18:05 | ST 128 | Jens Bauch, Simon Fraser University Montes Algorithm In Function Fields |
ST 135 | Giovanni Coppola, University of Salerno Elementary considerations on correlation averages |
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ST 143 | Damaris Schindler, Institute for Advanced Study Strong approximation and a conjecture of Harpaz and Wittenberg |
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ST 145 | Amy Wooding, McGill University Cycles on Unitary Shimura Varieties |
8:30–9:30 | ST Foyer | Registration |
9:30–10:30 | ST 148 | Jacob Tsimerman, University of Toronto (Ribenboim Prize Winner) Jacobians isogenous to abelian varieties in finite characteristic |
10:30–11:00 | ST Foyer | Coffee break |
∗ ∗ ∗ Special Session in Honour of Richard Guy ∗ ∗ ∗ | ||
11:00–12:00 | ST 148 | Joseph Silverman, Brown University Moduli Space for Dynamical Systems |
12:00-14:00 | Lunch break | |
14:00–15:00 | ST 148 | Manjul Bhargava, Princeton University Squarefree values of polynomial discriminants |
15:00–15:30 | ST 148 | Andrew Bremner, Arizona State University A cubic representation problem |
15:30–16:00 | ST Foyer | Coffee break and registration |
16:00–16:30 | ST 148 | Noam Elkies, Harvard University Crossing numbers of large complete graphs |
16:30–17:00 | ST 148 | Carl Pomerance, Dartmouth College The first function and the Guy-Selfridge conjecture |
17:15–18:30 | ST 148 | Public Lecture: Hugh C. Williams, University of Calgary The life and numbers of Richard Guy |
18:30–20:30 | EEEL Lobby | Reception |
8:30–9:30 | ST Foyer | Registration |
9:30–10:30 | ST 148 | Eyal Goren, McGill University Singular moduli |
10:35–11:05 | ST 148 | Gary Walsh, University of Ottawa Remembering Richard Anthony Mollin (with introductory remarks by Hugh C. Williams, University of Calgary) |
11:05–11:25 | ST Foyer | Coffee break and registration |
11:25–11:55 | ST 140 | Ellen Eischen, University of Oregon Congruences,modular forms, and L-functions |
ST 148 | Youness Lamzouri, York University Character sums, class numbers, and values of Dirichlet L-functions at 1 |
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12:00–12:35 | ST 140 | Timothy Trudgian, Australian National University (12:00–12:15) Square-free primitive roots |
Richard McIntosh, University of Regina (12:20-12:35) A relation between the universal mock theta function g2and Zwegers’ µ-function |
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ST 148 | Jeff Thunder, Northern Illinois University The discriminant problem: explicit results |
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12:40–12:55 | ST 148 | The Tutte Institute for Mathematics and Computing |
12:55– | ∗ ∗ ∗ Free Afternoon ∗ ∗ ∗ |
9:30–10:30 | ST 148 | Rachel Ollivier, University of British Columbia Representations of p-adic groups and Iwahori-Hecke algebras |
10:30–11:00 | ST Foyer | Coffee break and poster session |
11:00–11:30 | ST 140 | Arthur Baragar, University of Nevada On Apollonian circle packings and K3 surfaces |
ST 148 | Antonio Lei, Universite Laval Iwasawa theory of modular forms over imaginary quadratic fields |
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11:35–12:05 | ST 140 | Katherine Stange, University of Colorado Visualising the arithmetic of imaginary quadratic fields |
ST 148 | Matilde Lalın, Universite de Montreal The distribution of points on cyclic l-covers of genus g |
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12:05-13:45 | Lunch break | |
13:45–14:45 | ST 148 | Samir Siksek, University of Warwick Semistability, Uniformity and Modularity |
14:45–15:15 | ST Foyer | Coffee break and poster session |
15:15–15:45 | ST 140 | Patrick Ingram, Colorado State University Some questions on the arithmetic dynamics of correspondences |
ST 148 | Jaap Top, Rijksuniversiteit Groningen Richard’s favorite |
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15:45–16:00 | Break | |
16:00–16:15 | ST 128 | Stephan Ehlen, McGill University Regularized inner products of theta functions and special values of Eisenstein series on orthogonal groups |
ST 141 | Cindy (Sin Yi) Tsang, University of California Santa Barbara Galois module structure of the square root of the inverse different in abelian extensions |
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ST 143 | Alexander Dahl, York University Non-vanishing of derivatives of twisted L-functions using a differentiated double Dirichlet series |
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ST 145 | Nathan McNew, Towson University Random multiplicative walks on the integers modulo n |
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16:20–16:35 | ST 128 | Nahid Walji, University of Zurich On the distribution of Hecke eigenvalues for GL2 |
ST 141 | Jack Klys, University of Toronto The distribution of 3-torsion in cyclic cubic fields |
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ST 143 | Oleksiy Klurman, Universite de Montreal Correlations of multiplicative functions and applications |
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ST 145 | Joshua Holden, Rose-Hullman Institute of Technology Counting fixed points of the singular map x → xxn modulo powers of a prime |
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16:40–16:55 | ST 128 | Robert Grizzard, University of Wisconsin Slicing the stars |
ST 141 | Jose Ibrahim Villanueva Gutierrez, University of Bordeaux On the Logarithmic Class Group |
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ST 143 | Sam Chow, University of Bristol Roth–Waring–Goldbach |
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ST 145 | Adam Felix, KTH, Royal Institute of Technology How close are p−1 and order of a modulo p? |
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16:55–17:10 | Break | |
17:10–17:25 | ST 128 | Khoa Nguyen, University of British Columbia An extension of results by Mahler and Corvaja-Zannier |
ST 141 | Jennifer Paulhus, Grinnell College Completely decomposable Jacobian varieties |
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ST 143 | Alexander Mangerel, University of Toronto A refinement of a mean value estimate for complex-valued multiplicative functions |
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ST 145 | Kevin McGown, California State University, Chico Statistics of genus numbers of cubic fields |
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17:30–17:45 | ST 128 | Arnab Bose, University of Lethbridge Investigations on some exponential congruences |
ST 141 | Pedro Lemos, University of Warwick Serre’s uniformity conjecture for elliptic curves with rational cyclic isogenies |
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ST 143 | Kamalakshya Mahatab, Institute of Mathematical Sciences, Chennai Measure theoretic analysis of error terms |
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ST 145 | Andrew Fiori, University of Calgary The average number of quadratic Frobenius pseudoprimes |
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17:50–18:05 | ST 128 | Dijana Kreso, Technical University of Graz Lacunary polynomials and Diophantine equations |
ST 141 | Efthymios Sofos, University of Leiden Serre’s problem on the density of isotropic fibres in conic bundles |
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ST 143 | Ian Petrov, Ecole Polytechnique Federale de Lausanne Moments of the trace of Frobenius of elliptic curves over finite fields with specified subgroup |
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ST 145 | Lola Thompson, Oberlin College On integers n for which xn−1 has a divisor of every degree |
9:30–10:30 | ST 148 | Rachel Pries, Colorado State University Galois action on Fermat curves and Heisenberg extensions |
10:30–11:00 | ST Foyer | Coffee break |
11:00–11:30 | ST 140 | Kirsten Eisentrager, Pennsylvania State University A quantum algorithm for computing the unit group of a number field of arbitrary degree |
ST 148 | Jennifer Balakrishnan, University of Oxford Rational points on curves and iterated p-adic integrals |
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11:35–12:05 | ST 140 | Asif Zaman, University of Toronto The least prime ideal in the Chebotarev density theorem |
ST 148 | Sujatha Ramdorai, University of British Columbia Iwasawa theory and residual Galois representations |
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12:05-13:45 | Lunch break | |
13:45–14:45 | ST 148 | Adam Harper, University of Cambridge Gaussian and non-Gaussian behaviour of character sums |
14:45–15:15 | ST Foyer | Coffee break |
15:15–15:30 | ST 127 | Allysa Lumley, York University A zero density result for the Riemann zeta function |
ST 128 | Steffen Muller, University of Oldenburg Computing canonical heights in polynomial time |
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ST 135 | Sean Howe, University of Chicago The p-adic Jacquet-Langlands correspondence for the quaternion algebra of invariant p and a question of Serre |
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ST 147 | Fernando Xuancheng Shao, University of Oxford Vinogradov’s three primes theorem with almost twin primes |
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15:35–15:50 | ST 127 | Stanley Xiao, University of Waterloo Power-free values of binary forms and the global determinant method |
ST 128 | Aurore Guillevic, University of Calgary Discrete logarithm computation record in a finite field GF(p3) of 508 bits with the Number Field Sieve algorithm |
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ST 135 | Zafer Selcuk Aygin, Carleton University A family of eta quotients and an extension of the Ramanujan-Mordell Theorem |
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ST 147 | Xianchang Meng, University of Illinois Urbana-Champaign Chebyshev’s bias for products of k primes |
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15:55–16:10 | ST 127 | Anders Sodergren, University of Copenhagen Low-lying zeros of quadratic Dirichlet L-functions |
ST 128 | Jean-Francois Biasse, University of South Florida Fast heuristic algorithms for computing relations in the class group of a quadratic order with applications to isogeny evaluation |
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ST 135 | Alia Hamieh, University of Lethbridge Determining Hilbert modular forms by the central values of Rankin-Selberg convolutions |
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ST 147 | Joni Teravainen, University of Turku Almost primes in almost all short intervals |
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16:15–16:30 | ST 127 | Jack Buttcane, SUNY Buffalo The Kuznetsov formula on GL(3) |
ST 128 | Jonathan Webster, Butler University Searching for small strong pseudoprimes |
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ST 135 | Majid Shahabi, University of Calgary Modular Forms and Automorphic Forms for GSpin(2n+1) |
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ST 147 | Nathan Green, Texas A & M University L-values and Shtuka functions in Drinfeld modules |