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<span style="letter-spacing: normal; font-family: Osaka; font-size: 15px; font-weight: 400; color: rgb(0, 0, 0);">$B%*%s%i%$%s$G$N;22C$r$44uK>$NJ}$O!$2<5-$N(BURL$B$h$j$4EPO?$N$[$I$*4j$$?=$7>e$2$^$9!%(B</span></p>
<p style="text-align: left; line-height: normal; margin: 0px;"><span style="letter-spacing: normal; font-family: Osaka; font-size: 15px; font-weight: 400; color: rgb(0, 0, 0);">https://ritsumei-ac-jp.zoom.us/meeting/register/tJ0tceutrD4pHtWjZtVgSAJdzQKXEA9WSGSv</span></p>
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<span style="letter-spacing: normal; font-family: Arial; font-size: 16px; font-weight: 400; color: rgb(0, 0, 0);">$B9V1i<T!'(BJohn Parker $B;a(B (Durham Univ.)</span></p>
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<span style="letter-spacing: normal; font-family: Arial; font-size: 16px; font-weight: 400; color: rgb(0, 0, 0);">$B%?%$%H%k!'(BGeometry, tessellations and surfaces</span></p>
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<span style="letter-spacing: normal; font-family: Arial; font-size: 16px; font-weight: 400; color: rgb(0, 0, 0);">$B%"%V%9%H%i%/%H!'(B</span></p>
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<span style="letter-spacing: normal; font-family: Arial; font-size: 16px; font-weight: 400; color: rgb(0, 0, 0);">In this talk I will explain the relationship between two dimensional tessellations (sometimes called tilings) and surfaces. In order to do so,
I will need to introduce the geometry of spaces of constant curvature, where this curvature could be zero, positive or negative. The talk will be at a elementary level with many pictures.</span></p>
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<span style="letter-spacing: normal; font-family: Arial; font-size: 16px; font-weight: 400; color: rgb(0, 0, 0);">$BO"Mm@h!'(B $B9b66E5<w(B ( $BN)L?4[Bg3XM}9)3XIt?tM}2J3X2J!$(Be-mail: ntakaha@fc.ritsumei.ac.jp )</span></p>
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