[geometry-ml:00018] kaishi jikan no henkou

[Shin Nayatani]

$B3'MM(B

$B ＠ hF|$*CN$i$;$7$^$7$?2<5-$N8&5f2q$K$D$$$F!"=iF|$N%9%1%8%e!<%k$,(B
$BET9g$K$h$jJQ99$K$J$j$^$7$?$N$G!"$*CN$i$;$$$?$7$^$9!#(B
$B=iF|$N9V1i$O(B
$B#1#2!'#1#5!<#1#3!'#4#5(B	$B1JLn#1(B
$B#1#4!'#0#0!<#1#5!'#3#0(B	$BJ]:d#1(B
$B$H$J$j$^$9!#(B
$B#2!"#3F|L\$OJQ99$O$"$j$^$;$s!#(B

$BG<C+(B

-------------------------------------------------------------------------

$B!VN%;672$HHs ＠ 56JN(6u4V$N4v2?3X!W(B
$B#2#0#0#2G/#27n#1#9F|!J2P!K!]#2#1F|!JLZ!K(B
$B>l=j!'ElKLBg3X?t3XEo#2#0#1(B
$BLd$$9g$o$;@h!'(B
$BG<C+?.!JL>8E20Bg!K(Bnayatani ＠ math.nagoya-u.ac.jp
$BF#869LFs!JElKLBg!K(Bfujiwara ＠ math.tohoku.ac.jp
$B0f4XM5Lw!JElKLBg!K(Bizeki ＠ math.tohoku.ac.jp 

$B9V1i<T!'(B
$BKLLn98O/!JEl9)Bg!&M}9)!K!"?9F#9'G7!JEl5~G ＠ 9)Bg!&9)!K(B
$B9bBt8wI'!JEl9)Bg!&>pJsM}9)!K!"1JLn9,0l!JElKLBg!&M}!K(B
$BJ]:dE/Li!!!JC^GHBg!&?t3X!K(B

$B9V1iBjL\!'(B
$BKLLn!&?9F#!&9bBt!V(BS^1$B>e$N6JLLB+$N(B L^2-torsion$B$HBN ＠ QM=A[(B 1,2,3$B!W(B
$BJ]:d!VL58B(BCoxeter$B72$H$=$N6-3&!W(B
$B1JLn!V(BCAT(0)$B6u4VF~Lg!'(B (1) $B4pK\@-<A(B (2) $B:G6a$NOCBj$+$i!W(B

$B%9%1%8%e!<%k!'(B
$B!!!!!!!!!!#1#9F|!!!!!!#2#0F|!!!!!!!!!!#2#1F|(B
10:30$B!!!!!!!!!!!!!!!!!!KLLn#1!!!!!!!!1JLn#2(B
-12:00$B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(B

13:30$B!!!!!!1JLn#1!!!!!!J]:d#2!!!!!!!!J]:d#3!!!!(B
-15:00

15:15$B!!!!!!J]:d#1!!!!!!?9F##2!!!!!!!!KLLn!&9bBt#3(B
-16:45$B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(B

$B0J2<$N%[!<%`%Z!<%8$K$b0FFb$,$G$F$*$j$^$9!#(B
http://www.math.tohoku.ac.jp/meeting020219.html