VIG 2015   in honor of   Donald A. Martin   at the   UCLA Logic Center
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There will be a Very Informal Gathering of Logicians (VIG) at UCLA, from Friday, January 30, to Sunday, February 1, 2015, the eighteenth in a series of logic meetings at UCLA which started in 1976. This VIG is organized to honor Donald A. Martin on the occasion of his formal retirement from UCLA. It is partially supported by NSF Grant DMS 1463601.

### Friday, January 30, in Young Hall CS76 (the Chemistry building)      across the Court of Sciences from the Math building and Boelter Hall

3:00 - 3:30
Pierre Simon, Rosenthal compacta and NIP formulas.
Refreshments
4:10 - 4:40
Sherwood Hachtman, Calibrating the strength of Borel determinacy.
4:50 - 5:40
Andrew Marks, Uniformly Turing invariant functions and Borel combinatorics.

### Saturday, January 31, in IPAM (the Institute for Pure and Applied Mathematics)

 8:45 - 9:30 Breakfast 9:30 - 10:20 W. Hugh Woodin, The form of Ultimate-L. 10:30 - 11:20 Stephen Jackson, Forcing and combinatorial structure in Borel equivalence relations. 11:30 - 12:20 Sergei Starchenko, Topological groups, mu-types and their stabilizers (joint work with Y. Peterzil). 2:00 - 2:50 The 2015 Hjorth Lecture, Antonio Montalban, Vaught's conjecture and Computability Theory. Refreshments 3:30 - 4:20 Charles Parsons, Concepts versus objects. 4:30 - 5:20 Kit Fine, The possibility of vagueness. 5:30 - 6:20 Katrin Tent, Sharply 3-transitive groups .

### Sunday, February 1, in IPAM (the Institute for Pure and Applied Mathematics)

 9:15 - 10:00 Breakfast 10:00 - 10:50 Itay Neeman, Forcing on $\aleph_2$. 11:00 - 11:30 Anush Tserunyan, A general van der Corput lemma and underlying Ramsey theory . Refreshments 12:00 - 12:50 John Steel, Some equiconsistencies at the level of subcompact cardinals.