She was a star way before the current events. She solved a long-standing open problem in fundamental maths. This is the holy grail in maths research. The main resulting paper is single-author, so there is no doubt who did the work.
She got her PhD from Bonn in 2013 and became a full prof at EPFL in 2018 (in EU this type of progression takes 10-20 years, and this is extremely impressive even by US standards). It was very clear to everyone at that time that she would be big.
Or just look at the paper: https://arxiv.org/abs/1603.04246 you can't fake that with politics.
And to respond to a HN-er above who was mentioning that he/she found my question "distasteful" and "insinuating", yes, the reality today is that lots of people involved on one side of the current conflict in Eastern Europe have been receiving prizes and media attention just because of their nationality at this present moment in history, not necessarily because of their actual work in their respective fields. Glad to see that the "judges" (I have no idea who gives up this award, or how) behind the Field Medals have steered clear of all that and have sticked to merit.
"A very long-standing problem in mathematics is to find the densest way to pack identical spheres in a given dimension. It has been known for some time that the hexagonal packing of circles is the densest packing in 2 dimensions, while in 1998 Hales gave a computer assisted proof of the Kepler conjecture that the faced centered cubic lattice packing gives the densest packing in 3 dimensions. The densest packing wasn't known in any other dimension until in 2016 Viazovska proved that the E8 lattice gave the densest packing in 8 dimensions and, very shortly afterwards, together with Cohn, Kumar, Miller and Radchenko, proved that the Leech lattice gave the densest packing in 24 dimensions. Viazovska's approach built off work of Cohn and Elkies, who had used the Poisson summation formula to give upper bounds on the possible density of sphere packings in any dimension. Their work had suggested that in 8 and 24 dimensions there might exist a radial Schwartz function with very special properties (for instance it and its Fourier transform should vanish at the lengths of vectors in the respective lattice packings) which would give an upper bound equal to the lower bound coming from the known lattice packings. Viazovska invented a completely new method to produce such functions based on the theory of modular forms.
Viazovska has developed these ideas in other directions. With Radchenko she proved the unexpected result that any even Schwartz function such that it and its Fourier transform vanish at the square root of every non-negative integer must be identically zero. In fact they showed that any even Schwartz function can be written [...] for certain special functions a_n and b_n.
With Cohn, Kumar, Miller and Radchenko she showed that the E8 and Leech lattice not only gave optimal sphere packings in dimensions 8 and 24, but that they minimize energy for every potential function that is a completely monotonic function of squared distance."
Maybe if in no position to make an assessment it is better not to make one?!
> I agree that it is a distasteful question. But what is much more distasteful that it wouldn't be out of the realm of possibility for the answer to that question to be yes.
So you said it is not out of the realm of possibility for it to be the case, that is an assessment. By your own statement, you are in no position to judge, so how do you know it is possible?
What we know is that these dimensions support lattice structures with exceptional symmetries. The intricate geometry of these symmetries interacts with number theory to provide spectral data (automorphic forms) that have very rare properties; this is the starting point for Maryna's investigations.
Okounkov's popular scientific exposition "The magic of 8 and 24", linked in the article, goes into considerable detail on the constructions.
[1] https://twitter.com/mdfzeh/status/1543222792363163658