Since 2002 Perimeter Institute has been recording seminars, conference talks, public outreach events such as talks from top scientists using video cameras installed in our lecture theatres. Perimeter now has 7 formal presentation spaces for its many scientific conferences, seminars, workshops and educational outreach activities, all with advanced audio-visual technical capabilities.
Recordings of events in these areas are all available and On-Demand from this Video Library and on Perimeter Institute Recorded Seminar Archive (PIRSA). PIRSA is a permanent, free, searchable, and citable archive of recorded seminars from relevant bodies in physics. This resource has been partially modelled after Cornell University's arXiv.org.
Accessibly by anyone with internet, Perimeter aims to share the power and wonder of science with this free library.
Fractional branes and dynamical SUSY breaking
The causal set -- mathematically a finitary partial order -- is a candidate discrete substratum for spacetime. I will introduce this idea and describe some aspects of causal set kinematics, dynamics, and phenomenology, including, as time permits, a notion of fractal dimension, a (classical) dynamics of stochastic growth, and an idea for explaining some of the puzzling large numbers of cosmology. I will also mention some general insights that have emerged from the study of causal sets, the most recent one concerning the role of intermediate length-scales in discrete spacetime theories.
Statement by Roberto Unger;
Social science;
The crisis in all disciplines;
Time in mathematics and logic;
Website.
Internal/operational point of view vs. external point of view;
Microscopic ontology;
Notions and meaning of evolving laws.
Symmetry breaking and symmetry of physical laws;
Quantum mechanics and emergence;
Emergence, laws and unexplained features of nature;
Relational quantities.
Causality in biology;
Emergence of physical laws;
Holes in configuration space and ontology;
Self-reproducing entities.
Language and logic;
Quantification;
Identity;
Predicates;