Caucher Birkar
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/163002198@N03">ICM 2018</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/icm_2018/28951685697/">PHOTO PABLO COSTA/ICM 018.</a>