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DTSTART;TZID=Australia/Sydney:20251201T140000
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DTSTAMP:20260512T151948
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SUMMARY:'Is Dijkstra's Algorithm Optimal?' - A Basser-SMRI Joint Seminar by Robert Tarjan
DESCRIPTION:Dijkstra’s algorithm is a classic algorithm for doing route planning. Given a starting location it finds shortest paths from to all other reachable locations using the greedy method. Not only does it find shortest paths\, it finds these in increasing order by length. A natural question is whether this algorithm is best possible. The answer depends on exactly how one poses the question. The talk will cover recent work by the speaker and his colleagues that gives the answer “yes” and briefly examine work by others that gives the answer “no.” \n\n\n\nJoin us for the first Basser-SMRI Joint Seminar\, to be given by Robert Tarjan (Princeton). Basser Seminars highlight the best of computer science research. Feel free to distribute to others that may be interested. After the seminar\, please join us for a special afternoon tea\, held at 3 pm. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nRobert Tarjan\, Princeton University\n\n\n\n\n\nRobert Tarjan is the James S. McDonnell Distinguished University Professor of Computer Science at Princeton University. He has held academic positions at Cornell\, Berkeley\, Stanford\, and NYU\, and industrial research positions at Bell Labs\, NEC\, HP\, Microsoft\, and Intertrust Technologies. He has invented or co-invented many of the most efficient known data structures and graph algorithms. He was awarded the first Nevanlinna Prize from the International Mathematical Union in 1982 for “for outstanding contributions to mathematical aspects of information science\,” the Turing Award in 1986 with John Hopcroft for “fundamental achievements in the design and analysis of algorithms and data structures\,” and the Paris Kanellakis Award in Theory and Practice in 1999 with Daniel Sleator for the invention of splay trees. He is a member of the U.S. National Academy of Sciences\, the U. S. National Academy of Engineering\, the American Academy of Arts and Sciences\, and the American Philosophical Society. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nKey event details\n\n\n\n\n\nDate & time:  \n\n\n\nMonday 1 December 2025 \n\n\n\nSeminar: 2 — 3 pm \n\n\n\nAfternoon tea 3 pm — 4 pm \n\n\n\n\n\n\n\nCost:  \n\n\n\nThis is a free event \n\n\n\n\n\nLocation: \n\n\n\nThe Quad General Lecture Theatre K2.05 \n\n\n\nUniversity of Sydney\, Camperdown Campus
URL:https://mathematical-research-institute.sydney.edu.au/event/is-dijkstras-algorithm-optimal-a-basser-smri-joint-seminar-by-robert-tarjan/
CATEGORIES:Public events at SMRI
ATTACH;FMTTYPE=image/jpeg:https://mathematical-research-institute.sydney.edu.au/wp-content/uploads/2025/11/Bob-photo-2-scaled.jpg
END:VEVENT
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DTSTART;TZID=Australia/Sydney:20260313T120000
DTEND;TZID=Australia/Sydney:20260313T130000
DTSTAMP:20260512T151948
CREATED:20260218T235520Z
LAST-MODIFIED:20260428T232041Z
UID:8622-1773403200-1773406800@mathematical-research-institute.sydney.edu.au
SUMMARY:'Irrational ways of manufacturing numbers' - A special International Day of Mathematics Colloquium (1/2) by Tadashi Tokieda
DESCRIPTION:This is meant to be light mathematical entertainment\, exploring simple yet unusual phenomena involving rational\, irrational\, transcendental numbers.  We will also glean a few open problems. \n\n\n\nThis event is part of a series of 2 colloquia for International Day of Mathematics (Colloquium 2: Pure mathematics as applied physics). For catering purposes\, we would appreciate your registration if you intend to attend one or both events. \n\n\n\n\nRegistration\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nTadashi Tokieda\, Stanford University\n\n\n\n\n\nTadashi Tokieda is a professor of mathematics at Stanford.  He grew up in Japan as a painter\, became a classical philologist (not to be confused with philosopher) in France\, worked a little as a plumber\, before earning a PhD in pure mathematics from Princeton then practicing applied mathematics throughout the world.  Active in outreach\, especially via the YouTube channel Numberphile and the African Institute for Mathematical Sciences\, he gave public lectures at the quadrennial International Congress of Mathematicians 2018\, 2022\, and is slated to speak again at the ICM 2026. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nKey event details\n\n\n\n\n\nDate & time:  \n\n\n\nFriday 13 March 2026 \n\n\n\nSeminar: 12 — 1 pm \n\n\n\n\n\n\n\nCost:  \n\n\n\nThis is a free event \n\n\n\n\n\nLocation: \n\n\n\nCarslaw 175 \n\n\n\nUniversity of Sydney\, Camperdown Campus
URL:https://mathematical-research-institute.sydney.edu.au/event/irrational-ways-of-manufacturing-numbers-a-special-international-day-of-mathematics-colloquium-1-2-by-tadashi-tokieda/
CATEGORIES:Public events at SMRI
END:VEVENT
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DTSTART;TZID=Australia/Sydney:20260313T173000
DTEND;TZID=Australia/Sydney:20260313T193000
DTSTAMP:20260512T151948
CREATED:20260204T235201Z
LAST-MODIFIED:20260428T232041Z
UID:8301-1773423000-1773430200@mathematical-research-institute.sydney.edu.au
SUMMARY:'A world from a sheet of paper' International Day of Mathematics Public Lecture by Tadashi Tokieda
DESCRIPTION:Starting from just a sheet of paper\, by folding\, stacking\, crumpling\, tearing\, we shall explore a rich variety of phenomena\, from magic tricks and geometry through elasticity and the traditional Japanese art of origami to medical devices and ‘h-principle’. Much of the lecture consists of table-top demos.  \n\n\n\nThis public lecture is hosted by the Sydney Mathematical Research Institute as part of our program for International Day of Mathematics/ Pi Day. The talk will be tailored to a general audience and suitable for individuals from Year 10 onward. This is a free event\, however registration is essential. \n\n\n\n\n\n\n\n\n\nTadashi Tokieda\, Stanford University \n\n\n\n\n\n\n\nTadashi Tokieda is a professor of mathematics at Stanford.  He grew up as a painter in Japan\, became a classical philologist (not to be confused with philosopher) and worked a little as a plumber in France and\, after PhD in pure mathematics from Princeton\, has been an applied mathematician around the world.  He is active in outreach e.g. via the African Institute for Mathematical Sciences and the YouTube channel Numberphile; he gave public lectures at ICM 2018 and 2022\, and is slated to speak again at ICM 2026. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nKey event details\n\n\n\n\n\nDate & time:  \n\n\n\nFriday 13 March 2026 \n\n\n\nPublic lecture: 5:30 – 6:30 pm \n\n\n\nCanapés & drinks: 6:30 pm 8 pm \n\n\n\n\n\n\n\nCost:  \n\n\n\nThis is a free event \n\n\n\n\n\nLocation: \n\n\n\nLecture Theatre 321\, Susan Wakil Health Building\, University of Sydney\, Camperdown Campus \n\n\n\n\n\n\nRegister for this event
URL:https://mathematical-research-institute.sydney.edu.au/event/international-day-of-mathematics-pi-day-public-lecture-by-tadashi-tokieda/
CATEGORIES:Public events at SMRI
ATTACH;FMTTYPE=image/jpeg:https://mathematical-research-institute.sydney.edu.au/wp-content/uploads/2025/11/Tadashi_at_Harvard.jpeg
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DTSTART;TZID=Australia/Sydney:20260314T120000
DTEND;TZID=Australia/Sydney:20260314T160000
DTSTAMP:20260512T151948
CREATED:20260205T021734Z
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SUMMARY:Maths at the Museum\, including 'A magic show' by Tadashi Tokieda
DESCRIPTION:International Day of Mathematics 2026: Mathematics and Hope\n\n\n\n\n\nSaturday March 14 from 12 – 4pmSunday March 15 from 12 – 4 pm \n\n\n\nTo celebrate International Day of Mathematics\, SMRI presents our Maths at the Museum program\, running at the Chau Chak Wing Museum (CCWM).  \n\n\n\nThe official theme of the International Day of Mathematics in 2026 is “Mathematics and Hope”. Across the weekend we will explore mathematical concepts with talks\, panels\, children’s activities in our Maths Craft Room as well as A magic show by Tadashi Tokieda (Stanford University). This integrated program of interactive maths activities will run across the weekend\, coinciding with the opening weekend of the Biennale at the Museum! Please check back as more events are added! \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nActivities\n\n\n\nA magic show\, by Tadashi Tokieda\n\n\n\n12:30 – 1:30 pm (almost sold out) and 2:00 – 3:00 pm (New slot-booking fast!) both Saturday and Sunday\n\n\n\nTadashi Tokieda\, Stanford University \n\n\n\n\n\n\n\nA magic show should not steal its own thunder with an abstract\, but this one is easy for curious children and difficult for seasoned scientists\, and you can try it yourself afterwards on friends and family! \n\n\n\nAbout the presenter: Tadashi Tokieda is a professor of mathematics at Stanford.  He grew up as a painter in Japan\, became a classical philologist (not to be confused with philosopher) and worked a little as a plumber in France and\, after PhD in pure mathematics from Princeton\, has been an applied mathematician around the world.  He is active in outreach e.g. via the African Institute for Mathematical Sciences and the YouTube channel Numberphile; he gave public lectures at ICM 2018 and 2022\, and is slated to speak again at ICM 2026. \n\n\n\nThis event is hosted by the Sydney Mathematical Research Institute as part of our program for International Day of Mathematics. The talk will be tailored to a general audience and suitable for all ages\, from children to adults! This is a free event\, however registration is essential. \n\n\n\n\n‘A magic show’ registration\n\n\n\n\n\n\n\n\nMaths craft activities (Saturday and Sunday 12 – 4 pm)\n\n\n\nGet creative with a variety of maths craft activities – from making ‘origami fidget spinners’ to beautiful line art and much more\, these activities use mathematical concepts to make interesting and beautiful works\, many of which you can take home! \n\n\n\nMake your own flexagon\, and flexagon games! \n\n\n\nFlexagons are like the fidget spinners of the origami world; constructed of folded paper\, they reveal hidden faces when the paper is flexed. \n\n\n\nLine art \n\n\n\nFollow simple patterns to create colourful artwork using yarn or pen. This activity explores how you can use straight lines to form curves resulting in beautiful intricate designs. \n\n\n\n3D Fractals \n\n\n\nFractals are mathematical objects built from repeated copies of themselves. Visitors will construct units that will then be combined to contribute to our large-scale Menger Sponge. \n\n\n\nWeird mirrors \n\n\n\nUse a variety of bendy and wacky mirrors to explore concepts such as symmetry\, transformation and how to map a flat image onto a 3D object! Craft your own wacky mirror to take home. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nKey event details\n\n\n\n\n\nDate & time:  \n\n\n\nSaturday 14 March & Sunday 15 March 2026 \n\n\n\n12 pm – 4 pm  \n\n\n\n\n\n\n\nCost:  \n\n\n\nFree \n\n\n\n\n\nLocation: \n\n\n\nThe Chau Chak Wing Museum \n\n\n\nUniversity of Sydney\, Camperdown Campus
URL:https://mathematical-research-institute.sydney.edu.au/event/maths-at-the-museum/
CATEGORIES:Public events at SMRI
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260316T140000
DTEND;TZID=Australia/Sydney:20260316T150000
DTSTAMP:20260512T151948
CREATED:20260218T235854Z
LAST-MODIFIED:20260428T232041Z
UID:8624-1773669600-1773673200@mathematical-research-institute.sydney.edu.au
SUMMARY:'Pure mathematics as applied physics' - A special International Day of Mathematics Colloquium (2/2) by Tadashi Tokieda
DESCRIPTION:Humans tend to be better at physics than at mathematics.  When an apple falls from a tree\, there are more people who can catch it — they sense physically how the apple moves — than people who can compute its trajectory from a differential equation.  Applying physical ideas to discover and explain mathematical results is therefore natural\, even if it has seldom been tried in the history of science.  The exceptions include Archimedes\, some old Russian sources\, a recent book of Mark Levi’s\, as well as articles and lectures by yours truly.  Many examples will be presented. \n\n\n\nThis event is part of a series of 2 colloquia for International Day of Mathematics (Colloquium 1: Irrational ways of manufacturing numbers). For catering purposes\, we would appreciate your registration if you intend to attend one or both events.  \n\n\n\n\nRegistration\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nTadashi Tokieda\, Stanford University\n\n\n\n\n\nTadashi Tokieda is a professor of mathematics at Stanford.  He grew up in Japan as a painter\, became a classical philologist (not to be confused with philosopher) in France\, worked a little as a plumber\, before earning a PhD in pure mathematics from Princeton then practicing applied mathematics throughout the world.  Active in outreach\, especially via the YouTube channel Numberphile and the African Institute for Mathematical Sciences\, he gave public lectures at the quadrennial International Congress of Mathematicians 2018\, 2022\, and is slated to speak again at the ICM 2026. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nKey event details\n\n\n\n\n\nDate & time:  \n\n\n\nMonday 16 March 2026 \n\n\n\nSeminar: 2 — 3 pm \n\n\n\nAfternoon tea 3 pm — 4 pm \n\n\n\n\n\n\n\nCost:  \n\n\n\nThis is a free event \n\n\n\n\n\nLocation: \n\n\n\nA11.01.101.Edgeworth David Building\, Old Geology Lecture Theatre \n\n\n\nUniversity of Sydney\, Camperdown Campus
URL:https://mathematical-research-institute.sydney.edu.au/event/pure-mathematics-as-applied-physics-a-special-international-day-of-mathematics-colloquium-2-2-by-tadashi-tokieda/
CATEGORIES:Public events at SMRI
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20260512T170000
DTEND;TZID=Australia/Sydney:20260512T190000
DTSTAMP:20260512T151948
CREATED:20260416T035333Z
LAST-MODIFIED:20260507T043233Z
UID:8870-1778605200-1778612400@mathematical-research-institute.sydney.edu.au
SUMMARY:Celebrating Women in Mathematics
DESCRIPTION:#May12 #WomenInMaths #May12WIM\n\n\n\n\n\nJoin us for an evening celebrating women in mathematics here at the University of Sydney. All welcome.Featuring talks from: Neda Khodabakhsh JonianiNalini JoshiMadeline NurcombePratibha PanwarAnd a special screening: Je suis Sophie Germain \n\n\n\n\n\n\n\n\n\n\n\nTalk details:\n\n\n\n‘Mathematical Modelling of Corneal Epithelial Cells’Neda Khodabakhsh Joniani \n\n\n\nAbstract: The corneal epithelium is a self-renewing\, multilayered tissue maintained by limbal epithelial stem cells and the coordinated migration of their progeny; however\, the principles governing its stratification remain poorly understood. \n\n\n\nIn this talk\, I present a mathematical framework based on a Voronoi cell-based model that captures epithelial dynamics through mechanical interactions\, cell proliferation\, and vertical migration. I will further introduce a multi-layer extension of the model and discuss its implications for understanding wound healing dynamics. \n\n\n\nAbout the speaker: Neda is a PhD student in Applied Mathematics (Mathematical Biology)\, focusing on mathematical modelling of corneal epithelial cells. She is passionate about bridging theoretical mathematics with real-world biological applications\, including conducting experiments and capturing microscopy images for my project. She also works as a Postgraduate Teaching Fellow in the School of Mathematics and Statistics and as a Learning Success Advisor at the Learning Hub (Mathematics). Outside academia\, she enjoys cooking and spending time with her twins. \n\n\n\n\n\n\n\n‘The Hidden Lives of Polynomials’Nalini Joshi \n\n\n\nAbstract: Polynomials are the simplest building blocks for modelling our world. But there exist other useful functions\, called transcendental or special\, that can never satisfy any polynomial equation.  Nevertheless\, we can construct many of such functions from hidden properties of polynomials. I will describe how to deduce some of the most compelling transcendental functions today\, how they are related to reflection groups\, and how we see polynomials again in their solutions.  \n\n\n\nAbout the speaker: Nalini spent much of her early life on army bases in far flung corners of Burma (Myanmar). She fell in love with science after moving to Australia as a child and studied mathematics at the University of Sydney before completing a PhD at Princeton University. She is the first woman to ever be appointed a Professor of mathematical sciences at the University of Sydney.  \n\n\n\n\n\n\n\n‘Lattice loop models and diagram algebras’Madeline Nurcombe \n\n\n\nAbstract: Statistical mechanics is a branch of physics that aims to understand the behaviour of large systems of interacting particles. Many systems of interest\, from the atoms of a magnet to the long stringy molecules of a polymer\, can modelled as grid-like structures called lattices. Long-distance interactions in a lattice are often computationally infeasible to study\, but lattice loop models offer a tractable approach to this\, where the underlying mathematics can be described by diagram algebras: a fun pictorial tool where we multiply stringy\, loopy diagrams by gluing them to each other. \n\n\n\nAbout the speaker: Madeline is a postdoc in mathematical physics\, working on Lie superalgebra representation theory\, diagram algebras and integrable lattice models. She completed her PhD and undergraduate studies at the University of Queensland. Outside of maths\, she plays piano and chess\, and loves science fiction. \n\n\n\n\n\n\n\n‘Spatially-aware clustering with ClustSIGNAL’Pratibha Panwar \n\n\n\nAbstract: High-resolution spatial transcriptomics technologies allow us to measure gene expression and spatial location at single-cell resolution\, providing the opportunity to investigate cell organisation and interactions. However\, the inherent high sparsity and noise of these datasets make it challenging to cluster cells into biologically meaningful groups for further analysis. In this talk\, I will discuss the key concepts and implementation of a spatially-aware clustering framework that integrates expression and spatial information to perform adaptive smoothing of cells guided by their local neighbourhood heterogeneity.  \n\n\n\nAbout the speaker: Pratibha is a bioinformatician working on single-cell and spatial transcriptomics data. She completed her PhD at the University of New South Wales\, where she investigated the impact of climate change on Antarctic microbial communities. Her current research interests include developing and applying computational tools to gain biological insights into cellular organisation in diseased tissues. \n\n\n\n\n\n\n\nCatering and light refreshments will be provided\, please register here for catering purposes.For event enquiries\, please contact smri.comms@sydney.edu.au. \n\n\n\n\nRegistration\n\n\n\n\n\n\n\n\n\n\n\nKey event details\n\n\n\n\n\nDate & time:  \n\n\n\nTuesday 12 May 2026 \n\n\n\n5 pm — 7 pm \n\n\n\n\n\n\n\nCost:  \n\n\n\nThis is a free event \n\n\n\n\n\nLocation: \n\n\n\nThe Quad Seminar Room S421 (A13.04.S421) \n\n\n\nUniversity of Sydney\, Camperdown Campus
URL:https://mathematical-research-institute.sydney.edu.au/event/celebrating-women-in-mathematics/
CATEGORIES:Public events at SMRI
ATTACH;FMTTYPE=image/png:https://mathematical-research-institute.sydney.edu.au/wp-content/uploads/2026/04/Screenshot-2026-04-16-at-1.49.48-pm.png
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