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<span style="font-family:"Calibri","sans-serif""
lang="EN-CA">Dear Colleague,</span><span lang="EN-CA"><o:p></o:p></span>
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<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif""
lang="EN-CA"><a moz-do-not-send="true"
href="http://link.perimeterinstitute.ca/c/306/3e6d4a5c439b50b092a48321e0a4710f39a5e840bc984748f6b58cd770cf0952">GAP
2015: Geometry and Physics Summer School and
Conference</a> is taking place from May 25 to 30
at the Perimeter Institute. Our topic this year is:</span><span
lang="EN-CA"><o:p></o:p></span></p>
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style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><strong><span
style="font-family:"Calibri","sans-serif""
lang="EN-CA">Advances in Perturbation Theory and
Feynman Amplitudes</span></strong><span
lang="EN-CA"><o:p></o:p></span></p>
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style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif""
lang="EN-CA">We will have minicourses on Amplitudes,
Spectral Networks, Twistors, Resurgence, Cluster
Algebras, and the Exact WKB Method. </span><span
lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif""
lang="EN-CA">Please forward this announcement to any
graduate students, postdocs or faculty in geometry,
mathematical physics, or theoretical physics. For
your convenience, please <a moz-do-not-send="true"
href="http://link.perimeterinstitute.ca/c/306/3e6d4a5c439b50b092a48321e0a4710f39a5e840bc9847488cb34c18c102bae1"
target="_blank">click here for a downloadable
poster</a>.</span><span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif""
lang="EN-CA">On behalf of the organizers:</span><span
lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif""
lang="EN-CA">Freddy Cachazo<br>
Alberto García-Raboso<br>
Marco Gualtieri<br>
Ruxandra Moraru<br>
McKenzie Wang</span><span lang="EN-CA"><o:p></o:p></span></p>
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style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-CA">Perimeter Institute for Theoretical
Physics<br>
31 Caroline Street North<br>
Waterloo ON N2L 2Y5<br>
CANADA<br>
<a moz-do-not-send="true"
href="http://link.perimeterinstitute.ca/c/306/3e6d4a5c439b50b092a48321e0a4710f39a5e840bc984748d6aa86ea3ed7b049"
target="_blank">519-569-7600<br>
www.perimeterinstitute.ca</a></span><span
lang="EN-CA"><o:p></o:p></span></p>
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style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-CA"> </span><span lang="EN-CA"><o:p></o:p></span></p>
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