<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear Sir/Madam, <div class=""><br class=""></div><div class="">I would like to<b class=""> strongly support </b>the reduced fee request of the PhD student <b class="">David Albandea Jordan</b>. </div><div class=""><br class=""></div><div class=""> He started his PhD in the fall of 2020 under my supervision. During the first year he worked on a new algorithm</div><div class="">that incorporates winding steps in the HMC evolution and showed that it does achieve to surmount the topological</div><div class="">freezing in a two dimensional U(1) theory with and without fermions. This result was published in EPJC and presented</div><div class="">in last year conference. We are now working on improving this algorithm for 4D using machine learning techniques.</div><div class="">Recently he won a grant to do a three-month secondment at the U. of Edinburgh under the supervision </div><div class="">of Prof. L. Del Debbio, that he has just completed. In this short time he has learn the ML techniques that Del Debbio and collaborators </div><div class="">have recenlty worked on and implemented an improved algorithm in a scalar theory. The results look very promising and will be presented by </div><div class="">David at the lattice conference. </div><div class=""><br class=""></div><div class="">He has limited funding resources for travel, so I strongly support his request for a reduced fee. </div><div class="">He is totally worthy of this partial support !</div><div class=""><br class=""></div><div class="">Sincerely, </div><div class=""><br class=""></div><div class="">Prof. Pilar Hernández</div><div class="">University of Valencia</div></body></html>