Room CCIS L1029 
9:30  10am 
Gathering with coffee, tea 
10  10:10am 
Welcome & Opening Remarks, TPI Director 
10:10  11:10am 
Many Faces of Black Holes
Valeri Frolov
Killam Memorial Chair
Department of Physics, University of Alberta

11:10  12:10pm 
Lifting the Veil of the Gravitational Universe
Luis Lehner
Physics Department
University of Guelph and Perimeter Institute 


Room CCIS 4218 (Avadh Bhatia Room) 
12:10  1:15pm 
Lunch 

Room CCIS L1029 
1:15  2:15pm 
Which came first, physics or mathematics?
Vincent Bouchard
Mathematics Department, University of Alberta

2:15  3:15pm 
Black Hole Information
Don Page
Distinguished University Professor
Department of Physics, University of Alberta 

Room CCIS L1160 
3:15  3:30pm 
Coffee and cookies 
3:30  4:30pm 
Images on the Horizon: A View of Black Holes from the Event Horizon Telescope
Avery Broderick
Department of Physics and Astronomy
University of Waterloo and Perimeter Institute 


Speakers and Abstracts 

Many Faces of Black Holes
Valeri Frolov
Killam Memorial Chair
Department of Physics, University of Alberta
Black holes are the most intriguing objects, predicted by the General Relativity. A first (Schwarzschild) solution, describing a black hole was found a hundred years ago. Now black holes are in the focus of interest of astrophysics, theoretical physics and mathematics. Stellarmass and supermassive black holes are the most energetic engines in the Universe. In the theoretical physics, black holes play often the role of the Rosetta stone. They allow us to test new fundamental ideas and theories, such as higher dimensions and the string theory. Four and higher dimensional black hole solutions possess a number of remarkable mathematical properties. Black hole puzzles, such as the information loss paradox, the origin of black hole entropy, and internal structure and fate of evaporating black holes, are among the “hottest” subjects of the modern theoretical physics. In my talk I shall try to discuss why black holes play such a role of “great attractor” in modern theory.


Lifting the Veil of the Gravitational Universe
Luis Lehner
Physics Department
University of Guelph and Perimeter Institute
The second century of General Relativity will see the detection of gravitational waves which will provide unprecedented information about our universe. These waves which are perturbations of the very fabric of spacetime will allow us to explore our cosmos, answer fundamental questions and exploit them in combination with electromagnetic waves to allow for major breakthroughs in a number of fronts. This talk will discuss the theory and search efforts of some exciting, and likely soon to be realized, prospects.


Which Came First, Physics or Mathematics?
Vincent Bouchard
Associate Professor
Mathematics Department, University of Alberta
Einstein’s general relativity is a great example of the beautiful interconnections between mathematics and physics. But it uses mathematics mostly as a language to describe physics. In recent years the roles have been reversed: the number of fascinating results in various areas of mathematics, such as geometry, topology, and number theory, that have been obtained via the language of physics, notably string theory, is mindboggling. In this talk I will explore some of these striking mathematical results that come out of string theory, and try to explain why, from a physicist’s viewpoint, these should not really come as a surprise. By the end of the talk, you should hopefully be convinced of "the unreasonable effectiveness of physics in mathematics”!


Black Hole Information
Don Page
Distinguished University Professor
Department of Physics, University of Alberta
Stephen Hawking proposed that the formation of a black hole and its subsequent evaporation by the Hawking radiation he discovered would lose information in the sense of converting a pure quantum state to a mixed state with increased von Neumann entropy. Here I wish to summarize some of the arguments for and against information loss and discuss the puzzles that remain.


Images on the Horizon: A View of Black Holes from the Event Horizon Telescope
Avery Broderick
Department of Physics and Astronomy
University of Waterloo and Perimeter Institute
Supermassive black holes, located at the centers of galaxies, are at once an extreme consequence of general relativity and the sites of energetic processes that shape the cosmos. Nevertheless, their extraordinarily compact nature has prohibited the direct study of the key gravitational and astrophysical features underlying their nature and responsible for the astronomical importance. However, it has now become possible to generate images of a handful of astrophysical black holes that resolve their event horizons. I will discuss how this unique ability has become possible and how it is already beginning to shed light upon fundamental questions in both gravitational physics and highenergy astrophysics.
