# FieldsLive

August 28, 2015

## FieldsLive Video Archive

This archive holds videos of past Fields lectures. These videos may be viewed in two ways, by pressing the interactive or static buttons beside each lecture.

The interactive player provides the same unique ability to adjust the view, and zoom in and out when needed, that is provided by our FieldsLive live streaming system. It is still somewhat experimental and under development. It is targeted for desktop use and requires a web browser with the Flash Player plugin (version 11 or later), which is not available on many mobile devices.

Garbled video in the interactive version? May be a Flash Player bug. Try turning off hardware acceleration (right-click on video, choose "Settings", and click left-most icon on bottom to get to the display settings where you can turn it off).

The static button lets you view a precomposed video for viewing in any media player that supports the Ogg Theora video format (support for this is built in to the Firefox and Chrome browsers and should work on mobile devices too). It also allows the video to be downloaded for later viewing (right-click on the button). However, since zooming in is not possible, blackboard writing may not be legible.

The info (and, in some cases, slides) links take you to a web page with information and downloadable slides. If there is no slides link, there may still be downloadable slides available from within the info page.

### Workshop on Whitney Type Extension and Trace Problems (Other events)

For lectures prior to June 2012, and a few events from June-August 2012 before FieldsLive was fully operational, please see our old audio and slides page (which has audio, slides, and a few videos in special cases).

static info Charles Fefferman: Whitney’s extension problem in Sobolev spaces, Lecture 1 (August 27)
static info Charles Fefferman: Whitney’s extension problem in Sobolev spaces, Lecture 2 (August 27)
static info Kevin Luli: Whitney’s extension problem in Sobolev spaces, Lecture 3 (August 27)
static info Arie Israel: Whitney’s extension problem in Sobolev spaces, Lecture 4 (August 27)
static info Charles Fefferman: Whitney’s extension problem in Sobolev spaces, Lecture 5 (August 27)
static info Matthew Hirn: A general theorem of existence of quasi absolutely minimal Lipschitz extensions (August 28)
static info Piotr Hajlasz: Sobolev Spaces and the Whitney Extension Theorem (August 28)
static info Vladimir Gol’dshtein: Extension of Sobolev Functions to Capacitory Boundaries (August 28)
static info Andreea Nicoara: Properties of sheaves in the Kohn algorithm (August 28)
static info Yuri Brudnyi: Covering of a dyadic sieve and nonlinear approximation of BV functions (August 29)
static info Alf Jonsson: Spaces of Besov type defined on fractals (August 29)
static info Pavel Shvartsman: Sobolev $L^2_p$-functions on closed subsets of $R^2$, Lecture 1 (August 29)
static info Pavel Shvartsman: Sobolev $L^2_p$-functions on closed subsets of $R^2$, Lecture 2 (August 29)
static info Lizaveta Ihnatyeva: Smoothness spaces on Ahlfors regular sets (August 29)
static info Chen Li: Gradual Variations and Partial Differential Equations (August 30)
static info Alex Brudnyi: On the approximation properties of spaces predual to H1-spaces (August 30)
static info Michal Wojciechowski: The non-existence of the Banach lattice structure on the Sobolev spaces and space of functions of bounded variation (August 30)
static info Michal Wojciechowski: On the dependence of isomorphic type of spaces of smooth functions on the domain (August 30)
static info Erwan Le Gruyer: Some conjectures (August 31)
static info Krzysztof Kurdyka: Approximation of o-minimal maps satisfying a Lipschitz condition (August 31)
static info Athipat Thamrongthanyalak: Definable Version of Whitney’s Extension Theorem (August 31)
static info Pavel Shvartsman: Sobolev $L^2_p$ functions on closed subsets of $R^2$, Lecture 3 (August 31)