The Vaught conjecture is a conjecture in the mathematical field of model theory originally proposed by Robert Lawson Vaught in 1961.
 It states that the number of countable models of a first-order complete theory in a countable language is finite or ℵ or 2 .
 Morley showed that number of countable models is finite or ℵ or ℵ or 2 , which solves the conjecture except for the case of ℵ models when the continuum hypothesis fails.
 For this remaining case, has announced a counterexample to the Vaught conjecture and the topological Vaught conjecture.
 As of 2016 the counterexample has not been verified.
Eric Zaslow is an American mathematical physicist at Northwestern University.
 He attended Harvard for his Ph.D in Physics.
 His research focuses on mathematical questions arising from duality symmetries in theoretical physics such as mirror symmetry.
 With Andrew Strominger and Shing-Tung Yau, he formulated the SYZ conjecture.
In the field of mathematics, the Carlitz–Wan conjecture classifies the possible degrees of exceptional polynomials over a finite field "F" of "q" elements.
 Recall that a polynomial "f"("x") in "F"["x"] of degree "d" is called exceptional over "F" if every irreducible factor (differing from "x" − "y") of ("f"("x") − "f"("y"))/("x" − "y") over "F" will become reducible over the algebraic closure of "F".
 If "q" > "d", then "f"("x") is exceptional if and only if "f"("x") is a permutation polynomial over "F".
 The Carlitz–Wan conjecture states that there are no exceptional polynomials of degree "d" over "F" if ("d", "q" − 1) >  1.
 In the special case that "q" is odd and "d" is even, this conjecture was proposed by Carlitz (1966) and proved by Fried–Guralnick–Saxl (1993) The general form of the Carlitz–Wan conjecture was proposed by Daqing Wan (1993)
In mathematics, the Calabi conjecture was a conjecture about the existence of certain "nice" Riemannian metrics on certain complex manifolds, made by and proved by .
 Yau received the Fields Medal in 1982 in part for this proof.
Cristian Dumitru Popescu is a Romanian-American mathematician at the University of California, San Diego.
 His research interests are in Algebraic Number Theory, and in particular, in special values of L-functions.
 He formulated and proved function-field versions of the Gras conjectures and Rubin's integral refinement of the abelian Stark conjectures.
 He has also made important contributions to the Stark conjectures over number fields, formulating an alternative to Rubin's refinement, known as Popescu's conjecture.
 Although slightly weaker than Rubin's conjecture, it has the advantage that it can presently be shown to remain true under raising the base field or lowering the top field of the extension.
 Recently, Popescu and Cornelius Greither have formulated equivariant versions of Iwasawa's main conjecture over function fields and global fields, proving most the version for function fields.
 These conjectures have important implications for the Brumer–Stark conjecture and Gross' conjecture on special values of L-functions.
In mathematics, the Quillen–Lichtenbaum conjecture is a conjecture relating étale cohomology to algebraic K-theory introduced by , who was inspired by earlier conjectures of .
 and proved the Quillen–Lichtenbaum conjecture at the prime 2 for some number fields.
 Voevodsky, using some important results of Markus Rost, have proved the Bloch–Kato conjecture, which implies the Quillen–Lichtenbaum conjecture for all primes.
The SYZ conjecture is an attempt to understand the mirror symmetry conjecture, an issue in theoretical physics and mathematics.
 The original conjecture was proposed in a paper by Strominger, Yau, and Zaslow, entitled "Mirror Symmetry is "T"-duality".
The Fields Medal Symposium is an annual event that honours one of the Fields Medal recipients from the most recent International Congress of Mathematicians.
 The symposium is jointly endorsed by the International Mathematical Union and the Fields Institute for Mathematical Sciences.
 The idea was conceived in preparation for the International Congress of Mathematicians 2010 (ICM2010) in Hyberdad, India.
 Professor Edward Bierstone of the University of Toronto was the director of the institute during the inaugural symposium in October 2012.
 All symposiums take place at the Fields Institute in Toronto, Canada.
 The symposia include mathematical activity that explore work related to the honoured Fields Medallist.
 They will include public lectures meant to spark interest in mathematics including public lectures and events for students.
Shing-Tung Yau ( ; ; born April 4, 1949) is a Hong Kong and naturalised American mathematician.
 He was awarded the Fields Medal in 1982.
 He is currently the William Caspar Graustein Professor of Mathematics at Harvard.
Vladimir Ponkin is a Russian principal conductor, Professor and a recipient of both the Golden Mask and People's Artist of Russia award from Irkutsk.
 He is also a 2001 medal recipient "For the merits in development of Cuban region" and a 2006 cross recipient of "The Defender of Russia" as well as "For the Love and Faith to the Homeland" medal both of which were 1st grade.

Question: SYZ conjecture was proposed partly by which Fields Medal recipient?
Answer: Shing-Tung Yau