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CNRS; University of Montpellier
Wed 24 Apr 2019, 2:45pm SPECIAL
Mathematical Biology Seminar
ESB 4127
Adapting to climate change: insights from different mathematical models.
ESB 4127
Wed 24 Apr 2019, 2:45pm-3:45pm


As climate warms, different phenotypes, such as different flowering time in plants or breeding date in birds, are favored by natural selection. To persist, species must therefore change their geographical distribution to track the climate to which they were adapted to, and/or their phenotypic distribution to adapt to new climates. Quantitative genetics models describing joint changes in phenotypic and geographical distributions have been developed in the nineties to better understand the challenges faced by species under climate change. We have built on this work by examining how the life cycle of species affects and jointly evolves with these dynamics: I will present a few examples of work in progress where collaboration between mathematicians and evolutionary biologists have led to new insights on how age-structure, mode of reproduction, mutation and dispersal affect the response of species to climate change.
University of Wisconsin-Madison
Wed 24 Apr 2019, 3:00pm
Harmonic Analysis Seminar
MATX 1102
A maximal function for families of Hilbert transforms along homogeneous curves
MATX 1102
Wed 24 Apr 2019, 3:00pm-4:00pm


Let H^(u) be the Hilbert transform along the parabola (t; ut^2).
For a set U of real numbers consider the maximal function
H^U f = sup {H^(u) f  :  u in U}.
There are sharp results for the dependence of the L^p operator norm on U when 2 < p < 1, and close to sharp results when 1 < p <= 2.
The results 
are proved for families of Hilbert transforms along more general non-flat homogeneous curves.
Joint work with Shaoming Guo, Joris Roos and Po-Lam Yung.
James Tanton
Mathematical Association of America, Washington D.C.
Fri 26 Apr 2019, 4:30pm SPECIAL
ESB 1012 (Earth Sciences Bldg)
PIMS Public Lecture: A dozen proofs that 1=2, and a surprising tangle dilemma
ESB 1012 (Earth Sciences Bldg)
Fri 26 Apr 2019, 4:30pm-6:30pm


Abstract: Guidobaldo del Monte (1545-1647), a patron and friend of Galileo Galilei, believed he had witnessed the creation of something out of nothing when he established mathematically that zero equals one. He thereby thought that he had proved the existence of God! Although I daren't be so bold with my claims, I am willing to prove instead that one equals two. And, moreover, just to convince you that I am right I will do so multiple times over, drawing upon a wide spectrum of mathematical techniques: algebra and arithmetic, probability and mechanics, pure thought and physical action! Will you be able to find fault with any of my "proofs?"
For map and directions click here
To ensure we have enough refreshments please email and specify how many will be attending. Seating is limited.

Note for Attendees

4:30 p.m. - Cakes and refreshments

5:00 p.m.--6:30 p.m. - Lecture