<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><div class=""></div><div class=""><br class=""><div class="">
<span class="im" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; color: rgb(80, 0, 80);"><div dir="auto" style="overflow-wrap: break-word;" class=""><div dir="auto" style="color: rgb(0, 0, 0); overflow-wrap: break-word;" class=""><span style="color: rgb(153, 153, 153); font-family: arial, sans-serif; font-size: 12.7273px; background-color: rgb(255, 255, 255);" class="">Yoshinori Hashimoto</span></div><div dir="auto" style="overflow-wrap: break-word;" class=""><span style="background-color: rgb(255, 255, 255);" class=""><font color="#999999" face="arial, sans-serif" class=""><span style="font-size: 12.7273px;" class="">Department of Mathematics<br class="">Tokyo Institute of Technology<br class="">2-12-1 Ookayama, Meguro-ku,<br class="">Tokyo 152-8551<br class="">JAPAN</span></font></span></div></div></span><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div class="adm" style="margin: 5px 0px; color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255);"></div><div class="im" style="color: rgb(80, 0, 80); font-family: Arial, Helvetica, sans-serif; font-size: small; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(255, 255, 255);"></div></div>
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