| Date | Speaker | Title and Abstract |
| Thursday Jan 18 4-5pm Surge 275 |
Terry Fuller (CSU Northridge) | Realizing 4-manifolds as Achiral Lefschetz fibrations |
| Thursday Feb 1 |
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| Thursday Feb 8 |
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| Thursday Feb 15 |
Francis Bonahon (USC) will be
rescheduled to some later day soon. |
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| Wednesday Feb 21 Colloquium 4:10-5pm |
Akira Yasuhara (Tokyo
Gakugei U) |
Title: On classifications
of links up to C_n-moves Abstract: Let n be a positive integer. A C_n-move is a local move on links defined by Habiro, which can be regarded as a `higher order crossing change'. The C_n-equivalence is an equivalence relation on links generated by C_n-move. The C_m-equivalence implies the C_n-equivalence for m>n. So the C_n-classification, which is the classification up to C_n-equivalence, of links becomes finer as n increases. The C_2-classification of links and the C_3-classification of links with 2 or 3 components, or of algebraically split links are known. Here we give several classifications of certain sets of links by using Milnor invariants. |
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Thursday March 1 |
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| Friday March 9 4:10-5pm Surge 284 |
Oleg Viro (Uppsala) |
Title: Knot theory from 1D point of view |
| Thursday March 15 |
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| Thursday March 22 |
Final exam week: but there can
be a seminar on demand. |