Selected Research Talks


  1. Friday 27 October 2017, on "Characterizing the Twitter network of prominent politicians and hate groups in the USA (2016 Election)", Cramer Society Conference on Big Data, KTH, Stockholm, Sweden (PDF 6.4MB)
  2. Monday September 25 2017, on "Characterizing the Twitter networks of prominent politicians and hate groups", InfoLab Meeting, IT Department, Uppsala University, Uppsala, Sweden (PDF 5.8MB)
  3. Tuesday September 12 2017, on "Ancestries of a Recombining Diploid Population: Towards a theoretical union of bahavioural ecology and population genetics", Complex Systems Lunch seminar, Centre for Interdisciplinary Mathematics, Uppsala University, Uppsala, Sweden (PDF 13MB)
  4. Wednesday 15 March 2017, on "Black Robins of Rangatira and Ancestries of a Recombining Diploid Population", Upp-Upp Statistics Workshop, Uppsala University, Uppsala, Sweden (PDF 19MB)
  5. Tuesday 14 February 2017, on "The transmission process: A combinatorial stochastic process for the evolution of transmission trees over networks", CoSy Seminar, Centre for Interdisciplinary Mathematics, Uppsala University, Uppsala, Sweden
  6. Friday 10 February 2017, on "Models of Meme Transmissions in the Twitterverse", Celsius-Linne Lectures and Symposium, Uppsala, Sweden (PDF 9.2MB). See meme evolution programme
  7. Tuesday 13 December 2016, on "A non-parametric discrete random construction for the evolution of transmission trees on connected contact networks", at Centre for Mathematics and its Applications, Ecole Polytechnique, Palaiseau, France.
  8. Wednesday 23 November 2016, on "Towards mathematical models of socio-psychological diversity: Insights from a meme evolution programme in the twitterverse", as Professor invité au CMAP, Chaire Modélisation Mathématique et Biodiversité at Institut de paléontologie humaine, Paris, France (PDF 7.0MB).
  9. Thursday 17 November 2016, on "Nonparametric Density Estimation with Statistical Regular Pavings", Interval Analysis and Constructive Mathematics (16w5099) 5-Day-Workshop,Casa Matemática Oaxaca (CMO) in Mexico, November 13-18, 2016.
  10. Friday 26 August 2016, 0900-1200 hours, facilitated a workshop on "Big Data Analysis for the Humanities and Social Sciences" by King's Digital Lab, King's College London, Virginia Woolf Building room 1.34 22 Kingsway, London, WC2R 2LS, United Kingdom (git hub sources).
  11. Tuesday 23 August 2016, on "A Non-parametric Discrete Random Construction for the Evolution of Transmission Trees on Connected Contact Networks and their Bi-parametric Beta-splitting Projections onto the Quarter-plane", Department of Mathematics Seminar, Stockholm University, Sweden (chalk talk notes and details: 10.1016/j.jtbi.2016.07.038)
  12. Tuesday 21 June 2016, on "Scalable Object Recognition in the Cloud for a Swarm of Robots", at the Robotics and Automation Workshop, IEEE RAS NZ Chapter, CLAWAR, Room KF7, Kirkwood Village, University of Canterbury, Christchurch, New Zealand.
  13. Tuesday 03 May 2016 on "Apache Spark for Scalable Data Analytics", Technical Stream, May 2016 Event, Canterbury Tech, University of Canterbury, Christchurch, NZ (PDF 2.7MB)
  14. Thursday 19 November 2015 on "Ancestries of a Recombining Diploid Population" at Fifth Wellington Workshop in Probability and Mathematical Statistics, 19-20 November, 2015, Victoria University of Wellingtion, Wellington, New Zealand.
  15. Thursday 1 October 2015 on "The binary transmission process: a combinatorial stochastic process on rooted ranked planar binary trees over the contact graph of hosts in an epidemic" at Epidemics Group meeting, Mathematical Statistics Division, Department of Mathematics, Stockholm University, Stockholm, Sweden
  16. Tuesday 29 September 2015 on "Optimally smoothed L1-consistent adaptive multivariate histograms from a complementary pair of priority-queued Markov chains over statistical regular pavings" at Department of Mathematics, Uppsala University, Uppsala, Sweden
  17. Tuesday 15 September 2015 on "Mayonnaise, Mustard and Mathematics: a hydrodynamic limit of a correlated site percolation model of a viscoplastic fluid" at Center for Inter-disciplinary Mathematics Seminar Series, Uppsala University, Uppsala, Sweden
  18. Wednesday 09 September 2015 on "An Interval Tree Arithmetic for Computationally Amenable Operations with Maps in Some Metric Spaces", Logic Seminar Series, Department of Mathematics, Stockholm University, Sweden
  19. Thursday 23 July 2015 on "Towards a Behavioural Ecological Perspective of Population Genetic Processes: Insights from Rangatira Black Robin and Florida Scrub Jay" at School of Biological Sciences Seminar Series, University of Canterbury, Christchurch, New Zealand (PDF 19MB)
  20. Thursday 26 March 2015 on "Correlated Site Percolation: a Microscopic Gibbs Field Model for the Macroscopic Behaviour of a Viscoplastic Fluid" at School of Mathematics and Statistics Seminar Series, University of Canterbury, Christchurch, New Zealand (PDF 5.0MB)
  21. Thursday November 20 2014 on "A Short Introduction to Interval Analysis" at City College of New York Mathematics Colloquium, New York, NY, USA (PDF 12MB)
  22. Monday October 27 2014 on "Some Arithmetic, Algebraic and Combinatorial Aspects of Plane Binary Trees" at Cornell Discrete Geometry and Combinatorics Seminar, Cornell University, Ithaca, New York, USA (PDF 3.2MB)
  23. Friday October 10 2014 on "A Correlated Site Percolation Model of a Viscoplastic Fluid" at Cornell Center for Applied Mathematics Colloquium, Cornell University, Ithaca, New York, USA (PDF 5MB, video)
  24. Monday October 06 2014 on "Ancestries of Recombining Population Pedigrees: A Discrete Structural Perspective" at Cornell Probability Seminar, Cornell University, Ithaca, New York, USA (PDF 4MB)
  25. Wednesday September 24 2014 on "Statistical Regular Pavings for Bayesian Nonparametric Density Estimation" at Cornell Statistics Seminar, Cornell University, Ithaca, New York, USA (PDF 15MB)
  26. Friday September 05 2014 on "Population pedigree process of the Chatham Island black robin: A case of human-assisted spread of a maladaptive behavior in a critically endangered bird" at Cornell Center for Comparative and Population Genomics, Fall Symposium 2014, Cornell University, Ithaca, New York, USA (PDF 18MB)
  27. Friday June 26 2014 on "UC More, Feel More, Do More: Augmenting Engineering Mathematics Lectures and Tutorials with Visual, tactile and Kinaesthetic Learning Aids", College of Engineering Teaching Innovation Talks, University of Canterbury, Christchurch, New Zealand (PDF 4.0MB, PPTX 11MB)
  28. Friday May 02 2014 on "Algebra and Arithmetic of Plane Binary Trees: A Tree Arithmetic for Inclusion Algebras", Algebra Seminar Series, Department of Mathematics, University of Auckland, Auckland, New Zealand
  29. Thursday May 01 2014 on "Human-assisted spread of a maladaptive behavior in a critically endangered bird: sequential Monte Carlo on population pedigrees for rare events", Statistics Department Seminar Series, University of Auckland, Auckland, New Zealand
  30. Friday April 04 2014 on "Algebra and Arithmetic of Plane Binary Trees" at Maths and Stats Primer, School of Maths and Stats, University of Canterbury, Christchurch, New Zealand (PDF 4.1MB)
  31. Tuesday March 25 2014 on "Black Robins" at Canterbury Biomathematics Day, University of Canterbury, Christchurch, New Zealand (PDF 18MB)
  32. March 4 2014 on "Statistical Regular Pavings for Bayesian Nonparametric Density Estimation" at Advances in Scalable Bayesian Computation, The Banff International Research Station for Mathematical Innovation and Discovery (BIRS), March 3-7, 2014, Banff, Canada (PDF 5.2MB, video)
  33. December 9 2013 on "An Auto-validating Rejection Sampler for Differentiable Arithmetical Expressions using Randomized Priority Queues of Mapped Regular Pavings" at 14th European Workshop on Automatic Differentiation, 9th and 10th December 2013, Mathematical Institute, University of Oxford, UK
  34. November 12 2013 on "A Gibbs Field Model for the Microscopic Yielding of a Viscoplastic Fluid" at Laboratoire de Thermocinétique de Nantes, Université de Nantes et CNRS, Nantes, France (PDF 4.5MB)
  35. November 8 2013 on "Algebraic Biology of the Site Frequency Spectrum", Institut für Mathematik und Informatik, Universität Greifswald, Greifswald, Germany
  36. Thursday September 26 2013 - Bayes in Paris on Rue de Laplace - on "Posterior Expectation of Regularly Paved Random Histograms" at National School of Statistics and Economic Administration, (3 Avenue Pierre Larousse, 92240 Malakoff), Paris, France (XI'AN'S OG entry on it)
  37. Tuesday July 9 2013 on "There and back again: split and prune to tighten - a tree arithmetic with mapped regular pavings" at 2013 IEEE International Conference on Fuzzy Systems, FUZZ-IEEE 2013, Hyderabad, India (PDF 3.9MB)
  38. Wednesday October 24 2012 on "Population pedigree process of the Chatham island black robin: A case of human-assisted spread of a maladaptive behavior in a critically endangered bird" at Centre for Mathematics and its Applications, Ecole Polytechnique, Palaiseau, France (PDF 15MB)
  39. Monday October 15 2012 on "Mapped regular pavings" at Intervals Pavings and Applications 2012 (IPA2012), October 15-17 2012, Department of Mathematics, Uppsala University, Uppsala, Sweden (PDF 3.9MB)
  40. Tuesday October 2 2012 on "Posterior Expectation and Minimum Distance Estimation over Adaptive Histograms from Randomized Priority Queues of Statistical Regular Pavings" at Department of Mathematics, University of Oslo, Oslo, Norway (PDF 8256KB)
  41. Thursday September 27 2012 on "Arithmetic and Algebra of Mapped Regular Pavings" at 15’th GAMM-IMACS International Symposium on Scientific Computing, Computer Arithmetic and Verified Numerical Computations, SCAN'2012, September 23-29 2012, Novosibirsk, Siberia, Russia
  42. Sunday September 23 2012 on "An Auto-validating von Neumann Rejection Sampler: Computer-aided Proofs in Statistical Simulation" at Constraint Programming and Decision Making Workshop, CoProD'2012, September 23 2012, Novosibirsk, Siberia, Russia
  43. Thursday April 12 2012 on "Posterior Expectation of Regularly Paved Random Histograms" at Stochastic Networks Workshop, Auckland, North Island, New Zealand (PDF 8124KB)
  44. Saturday March 24 2012 on "Introducing the Math Explorer's Club of Ithaca New York for high schools in Christchurch" at Canterbury Mathematics Association Mini-Conference for Local High School Teachers, Christchurch, South Island, New Zealand
  45. Saturday 4th February 2012 - Friday 10th February 2012, First-and-Last Speaker, and Organizer of ABaCass2012 or (=A(lgebraic)B(iology)a(t)CASS)2012, Algebraic Biology Workshop in the Southern Alps, Cass, South Island, New Zealand
  46. Thursday February 2 2012 on "Ancestries of recombining population pedigrees" at South2012, The 16th Annual New Zealand Phylogenetics Meeting, Sunday 29th January - Friday 3rd February, Kaikoura, South Island, New Zealand
  47. Thursday January 26 2012 - Saturday January 28 2012, First Speaker and Co-organizer of ConstruMath South 2012, Mathematics Workshop on Applications of Non-classical Logic, Westport, South Island, New Zealand
  48. Thursday January 12 2012, Gave a Sage Hour at 2012 NZMRI/NZIMA Summer Workshop: Random Media and Random Walks, 8 - 13 January 2012, Nelson, South Island, New Zealand
  49. Sunday May 28 2011 on "Parameter estimation in epistemologically valid machine interval experiments" at Joint Mathematics-Philosophy Retreat, Kaikoura, South Island, New Zealand (PDF 744KB)
  50. Tuesday February 8 2011 on "Approximate Bayesian Computations Done Exactly" at ANR MANEGE Workshop, CMAP, Ecole Polytechnique, Palaiseau, France (PDF 2.9MB)
  51. Thursday December 16 2010 on "Experiments with the Site Frequency Spectrum" at the Bangalore Probability Seminar, Indian Statistical Institute, Bengaluru, Karnataka, India
  52. Friday September 11 2010 on "Inference of a Combinatorial Stochastic Process on Integer Partitions in Population Genomic Scans" at Soft Computing and Machine Intelligence Unit Seminar Series, Indian Statistical Institute, Kolkata, West Bengal, India
  53. Monday September 6 2010 on "The L_1 consistency of Statistical Regular Subpavings in massive density estimation" at Theoretical Statistics and Mathematics Division Seminar Series, Indian Statistical Institute, Kolkata, West Bengal, India
  54. Wednesday September 1 2010 (Plenary Talk) on "Randomised algorithms over dense trees of trees for massive metric data streams" at The International Congress of Mathematicians Satellite International Conference on Probability and Statistics, ICMSIC 2010, September 1-3, 2010, Sambalpur University, Sambalpur, Orissa, India (PDF 7.2MB) see
  55. Wednesday August 25 2010 on "A C++ class library for statistical set processing" at The International Congress of Mathematicians, August 19-27, 2010, Hyderabad, Andhra Pradesh, India
  56. Saturday August 14 2010 on "Exact transition probabilities of the number of ancestral sample lineages in the discrete ancestral recombination graph" at the ICM Satellite Conference on Probability and Stochastic Processes, August 13-17, 2010, Indian Statistical Institute, Bangalore, Karnataka, India (PDF 884KB)
  57. Wednesday July 21 2010 on "Statistical Regular Sub-pavings for Multivariate Density Estimation of Massive Data" at The Centre for Statistical and Survey Methodology Fellows Research Meeting, Goulburn 13, Goulburn, New South Wales, Australia
  58. Saturday May 15 2010 on "Trans-traditional Experiments: Incorporating Non-traditional Approaches into Classical Statistical Experiments" at Joint Mathematics-Philosophy Retreat, Westport, South Island, New Zealand
  59. Saturday February 13 2010 on "Lumpings of Coalescents with Multiple Mergers" at Doom2010, The Annual New Zealand Phylogenetics Meeting, Mount Ruapehu, North Island, New Zealand
  60. Thursday December 17 2009 on "Controlled Lumped Coalescent Markov Chains for Population Genomic Inference" at the First Swedish meeting on Theory and Mathematics in Biology and Medicine, Centre for Interdisciplinary Mathematics, Uppsala University, Sweden (PDF 252KB)
  61. Wednesday December 16 2009 on "Statistical Regular Sub-pavings in Multi-variate Density Estimation" at Ångström Laboratory, Uppsala University, Sweden (PDF 5.8MB)
  62. Sunday November 29 2009 on "Extracting all the information from the site frequency spectrum about the hidden genealogy" at the 12th Annual NZ Molecular Ecology Meeting at Catlins, Southland, New Zealand
  63. Saturday November 7 2009 on "Computational Statistics Laboratories with the SAGE Notebook Server" at Kiwi PyCon 2009, Christchurch, New Zealand
  64. Tuesday February 17 2009 on "An auto-validating trans-dimensional von Neumann rejection sampler" at The 3rd Workshop on High-Dimensional Approximation, Sydney, Australia (PDF 2.1MB)
  65. Wednesday July 16 2008 on "Kingman's Unlabeled n-Coalescent" at 7th World Congress in Probability and Statistics, Singapore (PDF 640KB)
  66. Sunday December 9 2007 on "An integrative, critically constructive, exchange on reasonable definitions of 'genetic-units' for conservation and bio-security, in terms of, the spatio-temporal scale(s) of the geo-dermo-dynamically coupled, helio-trophic continuum in space-time" at the 10th Annual New Zealand Molecular Ecology Meeting, Kaikoura, NZ
  67. Tuesday May 29 2007 on "Bayesian estimates of population genetic parameters using the unlabeled n-coalescent and the site frequency spectrum", Seminar, Department of Epidemiology and Public Health, Imperial College, London, UK
  68. Thursday February 15 2007 on "An auto-validating rejection sampler", Seminar,Centre for Research in Statistical Methodology (CRiSM), Warwick University, UK
  69. Sunday December 17 2006 on "Exact and approximate inference across different resolutions of DNA", Minisymposium on Genomic Introgression, National Evolutionary Synthesis Center (NESCent), Durham, North Carolina, USA
  70. Wednesday October 18 2006 on "An algebraic geometric approach to exact inference from classical population genetic summaries of a non-recombining locus", Seminar, Centre for Dynamical Processes and Structure Formation, Ångström Laboratory, Uppsala University, Sweden
  71. Thursday April 6 2006 on "Exactly Approximate Bayesian Computation", at The European Mathematical Genetics Meeting 2006, Cardiff, Wales, UK
  72. Thursday July 6 2006 on "Exactly Approximate Bayesian Computation" at 2nd Cornell Probability Summer School, Ithaca, New York, USA (PDF 390KB) or (PDF 390KB)
  73. Monday October 24 2005 on "Auto-validating samplers: sampling from pathological densities", Probability Seminar, Department of Mathematics, Cornell University, Ithaca, New York, USA
  74. Thursday March 10 2005 on "A randomized enclosure algorithm: Moore rejection sampling", Applied Math And Analysis Seminar, Department of Mathematics, Duke University, Durham, North Carolina, USA
  75. Friday February 25 2005 on "Interval methods for parametric bootstraps, phylogenetic inference and Monte Carlo sampling", Department of Statistics, Columbia University, New York, New York, USA
  76. Tuesday November 9 2004 on "Rigorous numerical inference via enclosures", Mathematical Genetics and Bioinformatics Seminar, Department of Statistics, University of Oxford, Oxford, UK
  77. Tuesday November 30 2004 on "Enclosing the most likely clovers", Algebraic Statistics for Computational Biology Lecture, Department of Mathematics, University of California, Berkeley, California, USA


Non-academic Talks


  1. 2014 OpenDay presentation, Maths and Stats, College of Engineering, University of Canterbury, Christchurch, New Zealand (PDF 4.2MB, PPTX 9.3MB)