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<div class="elementToProof"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="ContentPasted0">$B4v2?3X(BML$B$N3'MM!$(B</span></div>
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<div class="ContentPasted0">$BN)L?4[Bg3X$NLn_77<$G$9!#(B</div>
<div class="ContentPasted0">$B2<5-$NDL$j!$(B12$B7n(B23$BF|!J6b!K$KN)L?4[Bg3X4v2?3X%;%_%J!<$r(BZoom$B%_!<%F%#%s%0>e$G9T$$$^$9$N$G!$$40FFb$r$*Aw$j$7$^$9!%(B</div>
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<div class="ContentPasted0">https://ritsumei-ac-jp.zoom.us/meeting/register/tJAtcuuopzItG9a7hiN6QCcj101uvss_Y7j5</div>
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<div class="ContentPasted0">E-mail:hnozawa@fc.ritsumei.ac.jp</div>
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<div class="ContentPasted0">$B5-(B</div>
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<div class="ContentPasted0">$BN)L?4[Bg3X4v2?3X%;%_%J!<(B</div>
<div class="ContentPasted0">$BF|;~!'(B2022$BG/(B12$B7n(B23$BF|!J6b!K(B 16:30--17:30</div>
<div class="ContentPasted0">$B2q>l!'(BZoom$B%_!<%F%#%s%0(B</div>
<div class="ContentPasted0">$B9V1i<T!'(BJohn Parker$B;a(B (Durham $BBg3X(B)</div>
<div class="ContentPasted0">$B%?%$%H%k!'(B Non-arithmetic lattices</div>
<div class="ContentPasted0">$B%"%V%9%H%i%/%H!'(B</div>
<div class="ContentPasted0">A lattice is a discrete group of isometries of a symmetric space so that the quotient has finite volume. Combining results of Margulis, Gromov, Schoen and Corlette all lattices arise from an arithmetic construction apart from when
the space is real or complex hyperbolic space. Lattices that do not arise from this construction are called non-arithmetic. I will give an introduction to this topic and then I will outline my joint project with Martin Deraux and Julien Paupert where we constructed
the first examples since 1986 of non-arithmetic lattices for complex hyperbolic 2-space.</div>
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<div class="ContentPasted0">$B3+:EJ}K!!'(B</div>
<div class="ContentPasted0">$BN)L?4[Bg3X$S$o$3!&$/$5$D%-%c%s%Q%9(B $B%&%'%9%H%&%#%s%0(B6$B3,CLOC2q<<$G$N9V1i$r(BZoom$B%_!<%F%#%s%0$GG[?.$9$kM=Dj$G$9!%0J2<$N%U%)!<%`$h$j(B12$B7n(B22$BF|!JLZ!K$^$G$K$*?=$79~$_$/$@$5$$!%(B</div>
<div class="ContentPasted0">https://ritsumei-ac-jp.zoom.us/meeting/register/tJAtcuuopzItG9a7hiN6QCcj101uvss_Y7j5</div>
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