BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:Jorge A Robinson Arrieta's Doctoral Dissertation Defense
X-WR-TIMEZONE:Central Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20261010T110459Z
UID:tag:localist.com\,2008:EventInstance_53478702493165
DTSTART:20260721T140000Z
DTEND:20260721T160000Z
DESCRIPTION:Abstract\n\nOn Laudenbach-type exact sequences\n\n \n\n \n\nLau
 denbach proved that the mapping class group of the connected sum of $n$ co
 pies of $S^2 \\times S^1$ is an extension of $\\text{Out}(F_n)$ by a finit
 e group. Brendle\, Broaddus and Putman proved that this exact sequence spl
 its. We provide an explicit section $s$ of this split exact sequence. Give
 n a locally finite graph $\\Gamma$\, Udall proved that the mapping class g
 roup of the doubled handlebody associated to $\\Gamma$ is an extension of 
 $\\map(\\Gamma)$ by a possibly infinite direct product of $\\Z_2$\, and pr
 oved that this exact sequence splits. We provide an explicit formula for t
 his section $s$ of $\\Psi$ restricted to $\\pmap(\\Gamma)$\, and in the ca
 se that\n$E(\\Gamma) < \\infty$\, we provide a formula for a section $s : 
 \\map(\\Gamma)\\xrightarrow{}\\map(M_\\Gamma)$ of $\\Psi$.
GEO:36.066982;-94.172344
LOCATION:(SCEN) Science Engineering Building\, 322
SUMMARY:Jorge A Robinson Arrieta's Doctoral Dissertation Defense
URL;VALUE=URI:https://calendars.uark.edu/event/jorge-a-robinson-arrietas-do
 ctoral-dissertation-defense
END:VEVENT
END:VCALENDAR