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- When is the causal boundary of spacetime Haussdorf? III — Department of Mathematics and Computer Science

2004 from 11 00 AM to 11 50 AM Where RH 316 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology Seminar

Original URL path: http://mathcs.slu.edu/events/imported/F04-11-05-04-Top (2016-02-12)

Open archived version from archive - Invariants on Graphs Part II — Department of Mathematics and Computer Science

11 00 AM to 11 50 AM Where RH 316 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology Seminar Tue Feb

Original URL path: http://mathcs.slu.edu/events/imported/F04-10-08-04-Top (2016-02-12)

Open archived version from archive - Invariants on Graphs Part I — Department of Mathematics and Computer Science

problem for knots in the three sphere Our major result is the existence of a unique isotopy class of longitudes of a cycle for an infinite class of graphs We then define new invariants for this infinite class of graphs First we define a longitude of a cycle in the graph In contrast to the situation of a knot for a graph it is quite difficult to canonically select an isotopy class of longitudes However we prove that longitudes exist for any cycle in any finite graph and are unique in certain situations This definition of a longitude can be considered an extension of the definition of a longitude of a tamely embedded knot in the three sphere Next in the situation in which the longitude for a cycle is unique we define a sequence of invariants which detect whether this longitude lies in the n th term of the lower central series of the fundamental group of the complement of the graph in the three sphere These invariants can be viewed as extensions of Milnor s invariants of a link Although this invariant is not complete we provide examples illustrating that this invariant is more sensitive than Milnor s

Original URL path: http://mathcs.slu.edu/events/imported/F04-10-01-04-Top (2016-02-12)

Open archived version from archive - Heterogeneous Riemannian Manifolds Part II — Department of Mathematics and Computer Science

11 00 AM to 11 50 AM Where RH 316 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology Seminar Tue Feb

Original URL path: http://mathcs.slu.edu/events/imported/F04-09-10-04-Top (2016-02-12)

Open archived version from archive - Heterogeneous Riemannian Manifolds Part I — Department of Mathematics and Computer Science

11 00 AM to 11 50 AM Where RH 316 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology Seminar Tue Feb

Original URL path: http://mathcs.slu.edu/events/imported/F04-09-03-04-Top (2016-02-12)

Open archived version from archive - A classification of isometry groups of a Seifert fibered space N which is double covered by a lens space L — Department of Mathematics and Computer Science

RH 134 Add event to calendar vCal iCal Abstract Let W be a twisted I bundle over a Klein bottle fibered trivially and V be a type p q exceptionally fibered solid torus Since partial V and partial W is a torus we may form a quotient space N by identifying the boundaries via a fiber preserving homeomorphism Then N is a Seifert fiber space with one exceptional fiber of type p q whose base space is a projective plane containing the exceptional point of order p In the talk we see that N is double covered by a symmetric lens space L which gives a geometric structure on N This allows us to compute the isometry group of N denoted by Isom N It turns out that L and Isom N are completely determined by the initial assignment of a type p q fibration on V In other words we will classify how a fibration type affects topological structures of N and L as well as Isom N Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13

Original URL path: http://mathcs.slu.edu/events/imported/S04-01-29-04-Top (2016-02-12)

Open archived version from archive - Three topologies for boundaries of spacetimes, II — Department of Mathematics and Computer Science

from 03 45 PM to 04 45 PM Where RH 134 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology Seminar Tue

Original URL path: http://mathcs.slu.edu/events/imported/F03-12-11-03-Top (2016-02-12)

Open archived version from archive - Ricci Flow (and Perelman's work on Thurston's Geometrization Conjecture) — Department of Mathematics and Computer Science

25 2003 from 03 45 PM to 04 45 PM Where RH 134 Add event to calendar vCal iCal Document Actions iCalendar vCalendar Send this Print this February 2016 February Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Upcoming Events Geometry Topology

Original URL path: http://mathcs.slu.edu/events/imported/F03-09-25-03-Top (2016-02-12)

Open archived version from archive