# Dr Timothy Trudgian

## Areas of expertise

- Algebra And Number Theory 010101

## Biography

I graduated from the Australian National University in 2005, and received a General Sir John Monash Award to study overseas. In early 2010 I was awarded my DPhil from the University of Oxford, having studied under Prof. D.R. Heath-Brown.

I once took 6/24 in a college cricket match bowling an optimistic variety of medium-pace. I rather suspect that the opposition reversed their batting order.

During 2009-2010 I was a Lecturer in Mathematics at Merton College, Oxford. During 2010-2012 I was a postdoctoral research fellow at the University of Lethbridge.

## Researcher's projects

- An explicit sub-convexity estimate for the zeta-function (with Dave Platt, Bristol)
- A further improvement on S(t)
- A log-free zero-density theorem for a class of L-functions (with Amir Akbary, Lethbridge)
- An explicit bound on 1/|\zeta(\sigma + it)| for \sigma near 1
- The Linnik--Golbach problem (with Dave Platt, Bristol)
- The first sign change in Mertens' formula (with Yannick Saouter, CNRS and Patrick Demichel, Hewlett-Packard France)

## Available student projects

The following is a brief list of some honours and undergraduate projects. Please email me for more information.

Some general topics that provide an introduction to analytic number theory are

- The theory of the Riemann zeta-function
- Waring's problem
- Computational searches for specific primes

Some specific topics are

- Turan's power sum method
- The failure of the Mertens conjecture
- Explicit zero-free regions of the zeta-function and other L-functions
- Skewes' Number for Mertens' theorem

## Current student projects

- Adrian Dudek, PhD Student,
*Consequences of numerical verification of the Riemann hypothesis to large heights*, commenced November 2012 - Jeffrey Lay, Honours Student,
*Multiplicities of the zeroes of the Riemann zeta-function*,

## Past student projects

- Benedict Morrissey, Summer Research Scholar,
*Zero-density theorems for the Riemann zeta-function*, 2012-2013 - Shuhui He, Summer Research Scholar,
*Exploring exponent pairs,*2012-2013 - Eloise Hamilton, Summer Research Scholar,
*Explicit bounds on the nth prime number*, 2013-2014 - Nam Ho, Summer Research Scholar,
*Elliptic curves and triangle problems*, 2013-2014

## Publications

- Saouter, Y, Demichel, P and Trudgian, T A still sharper region where $\pi(x) - \textrm{li}(x)$ is positive, to appear in Math. Comp.
- Best, D and Trudgian, T 'Linear relations of the zeroes of the zeta-function', to appear in Math. Comp.
- Trudgian T 2014, 'An improved upper bound for the error in the zero-counting formulae for Dirichlet $L$-functions and Dedekind zeta-functions', to appear in Math. Comp.
- Trudgian, T 2014, 'An improved upper bound for the argument of the Riemann zeta-function on the critical line II', J. Number Theory, vol. 134, pp. 280-292
- Trudgian, T 2014, 'A new upper bound for $|\zeta(1+ it)|$', Bull. Aust. Math. Soc. vol. 89, iss. 2, 259-264.
- Trudgian, T 2013, 'Twin progress in number theory', AustMS Gazette, vol. 40, no. 3, pp. 202-208
- Trudgian, T 2012, 'An improved upper bound for the argument of the Riemann zeta-function on the critical line', Mathematics of Computation, vol. 81, no. 278, pp. 1053-1061.
- Mossinghoff, M & Trudgian, T 2012, 'Between the problems of Polya and Turan', J. Austral. Math. Soc., vol. 93, iss. 1-2, pp. 157-171
- Trudgian, T 2011, 'Selberg's method and the multiplicities of the zeroes of the Riemann zeta-function', Commentarii Mathematici Universitatis Sancti Pauli, vol. 60, no. 1-2, pp. 227-229.
- Trudgian, T 2011, 'Improvements to Turing's Method', Math. Comp., vol. 80, pp. 2259-2279
- Trudgian, T 2011, 'On the success and failure of Gram's Law and the Rosser Rule', Acta Arith., vol. 148, no. 3, pp. 225-256
- Trudgian, T 2010, 'On a Conjecture of Shanks', J. Number Theory, vol.130, iss.12, pp. 2635-2638
- Trudgian, T 2009, 'Introducing Complex Numbers', The Australian Senior Mathematics Journal, vol. 23, no. 2, pp. 59-62