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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Julian Barbour


PIRSA:17050043  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Shape Dynamics: Perspectives and Problems
Speaker(s): Julian Barbour
Abstract: Shape Dynamics(SD) can be derived from principles that differ in significant respects from Einstein's derivation of GR. It requires a spatially closed universe and allows a smaller set of solutions than GR does for this case. There are indications that its solution space can be fully characterized a... read more
Date: 15/05/2017 - 9:35 am

PIRSA:15060030  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Typicality of Universes and Discussion
Speaker(s): Julian Barbour
Abstract:
Date: 26/06/2015 - 9:30 am

PIRSA:13070040  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Shape Dynamics - 1
Abstract:
Date: 22/07/2013 - 2:30 pm
Collection: Loops 13

PIRSA:12060007  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Does Time Exist?
Speaker(s): Julian Barbour
Abstract:
Date: 06/06/2012 - 7:00 pm

PIRSA:12050050  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Shape Dynamics and General Relativity
Speaker(s): Julian Barbour
Abstract: Shape Dynamics first arose as a theory of particle interactions formulated without any of Newton's absolute structures. Its fundamental arena is shape space, which is obtained by quotienting Newton's kinematic framework with respect to translations, rotations and dilatations. This leads to a univers... read more
Date: 09/05/2012 - 2:00 pm
Series: Colloquium

PIRSA:10050060  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The case for geometry
Speaker(s): Julian Barbour
Abstract:
Date: 22/05/2010 - 10:40 am

PIRSA:08100040  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Was Spacetime a Glorious Historical Accident?
Speaker(s): Julian Barbour
Abstract: Exactly half a century after Minkowski’s justly famous lecture, Dirac’s efforts to quantize gravity led him “to doubt how fundamental the four-dimensional requirement in physics is”. Dirac does not appear to have explored this doubt further, but I shall argue that it needs to be considered s... read more
Date: 01/10/2008 - 2:00 pm
Series: Colloquium

PIRSA:08090064  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Theory of Duration and Clocks
Speaker(s): Julian Barbour
Abstract: In 1898, Poincaré identified two fundamental issues in the theory of time: 1)What is the basis for saying that a second today is the same as a second tomorrow? 2) How can one define simultaneity at spatially separated points? Poincaré outlined the solution to the first problem { which amounts to a... read more
Date: 28/09/2008 - 10:00 am

PIRSA:08100033  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Some issues in quantum gravity
Speaker(s): Julian Barbour
Abstract: TBA
Date: 25/09/2008 - 2:00 pm
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