<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif;font-size:small"><div class="gmail_default"><div dir="ltr"><div><font face="georgia, serif" color="#000000"><font style="vertical-align:inherit"><font style="vertical-align:inherit"><b>When:</b>    </font></font><font style="vertical-align:inherit"><font style="vertical-align:inherit">    Monday, November 11th at <b style="background-color:rgb(255,255,0)">11:30am CT</b><b> </b></font></font><br></font></div></div><div><p style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;margin:0px"><font color="#000000"><font style="vertical-align:inherit"><font face="georgia, serif" style="vertical-align:inherit"><b><span style="background-color:rgb(255,255,0)"><br></span></b></font></font></font></p><div class="gmail_default"><font face="georgia, serif" color="#000000"><b>Where:       </b>Talk will be given <font style="font-weight:bold"><u>live, in-person</u></font><font style="font-weight:bold"> </font>at</font></div><p class="MsoNormal" style="margin:0in;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif" color="#000000">                       TTIC, 6045 S. Kenwood Avenue</font></p><p class="MsoNormal" style="margin:0in;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font color="#000000" face="georgia, serif">                       5th Floor, Room 530<b> </b></font></p><p class="MsoNormal" style="margin:0in;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><b><font face="georgia, serif" color="#000000"><br></font></b></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif" color="#000000"><b style="letter-spacing:0.2px">Virtually:</b><span style="letter-spacing:0.2px">  via Panopto </span>(<a href="https://uchicago.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=2a4acdd8-e608-4a39-9f99-b21800f5fe42" target="_blank">livestream</a><span style="letter-spacing:0.2px">)</span><br></font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif" color="#000000"><br></font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="georgia, serif" color="#000000"><font style="vertical-align:inherit"><font style="vertical-align:inherit"><b>Who: </b>         </font></font>Tian Li, University of Chicago</font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"></p><div><p style="letter-spacing:0.2px"><font face="georgia, serif" color="#000000"><span style="letter-spacing:normal"><b>Title:</b>          </span><span style="letter-spacing:normal">Tilted Empirical Risk Minimization</span></font></p><div><font face="georgia, serif" color="#000000"><b>Abstract:  </b>Exponential tilting is a technique commonly used in fields such as statistics, probability, information theory, and optimization to shift distributions in a controlled manner. In this talk, I introduce its usage in machine learning by exploring the use of tilting in risk minimization. The tilted empirical risk minimization (TERM) framework is a simple extension of ERM, which uses exponential tilting to flexibly tune the impact of individual losses. I motivate the tilted objective from real-world use-cases on addressing representation disparity in federated learning. I describe several useful theoretical properties of TERM including its connections with other non-ERM objectives, how it leads to a tighter Chernoff bound, and a multitude of applications regarding fair and robust ML. I will conclude the talk by discussing ongoing work on leveraging this framework to improve sharpness-aware optimization, as well as other related research.</font></div><div><font face="georgia, serif" color="#000000"><br></font></div><div><font face="georgia, serif" color="#000000"><b>Short Bio</b>: Tian Li is an Assistant Professor at the Computer Science Department and Data Science Institute at the University of Chicago. Her research interests are in optimization, trustworthy machine learning, and efficient learning in large-scale settings. She has spent time at Microsoft Research Asia, Google Research, and Meta Foundational AI Research Labs. She was invited to participate in the EECS Rising Stars Workshop, and was recognized as a Rising Star in Machine Learning/Data Science by multiple institutions. Her team won the first place in the Privacy-Enhancing Technologies (PETs) Challenge featured by the White House. She received her PhD in Computer Science from Carnegie Mellon University and BS degrees in Computer Science and Economics from Peking University.</font></div><font face="georgia, serif" color="#000000"><br><b>Host: <a href="mailto:zhiyuanli@ttic.edu" target="_blank">Zhiyuan Li</a></b></font></div></div></div><font color="#888888"><div><br style="font-family:Arial,Helvetica,sans-serif"></div></font></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><b style="background-color:rgb(255,255,255)"><font color="#3d85c6">Brandie Jones </font></b><div><div><div><font color="#3d85c6"><b><i>Executive </i></b></font><b style="color:rgb(61,133,198)"><i>Administrative Assistant</i></b></div></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6">Toyota Technological Institute</font></span></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6">6045 S. Kenwood Avenue</font></span></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6">Chicago, IL  60637</font></span></div></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6"><a href="http://www.ttic.edu" target="_blank">www.ttic.edu</a> </font></span></div><div><span style="background-color:rgb(255,255,255)"><font color="#3d85c6"><br></font></span></div></div></div></div>