wongwwy -at-
math.msu.edu
D303 Wells Hall

Math Department Seminars
Willie WY Wong If we knew exactly the laws of nature and the situation of the universe at the initial moment, we could predict exactly the situation of the same universe at a succeeding moment ~HP Home Research Teaching Expository Seminar Notes Student Info

## News

• (2017.08.16) spurred on by the mini-course I gave at the YMSC, I finally finished the "vector field method" chapter of my lecture notes on dispersive equations. The new file can be found here.
• (2017.6.22) I will be traveling a bit this summer.
• (2016.9.30) I'm working on some software to visualize cross-references within a mathematical manuscript. A preliminary version of the code, applied to a recent paper of mine, can be seen in action here. The code can be found at my MSU Gitlab repo; the version there lags a little bit behind the version used to generate the output seen above, and will be updated after I decide on some design issues.

## A topology problem that is bothering me

If you know something about point-set topology and properties of Euclidean spaces, please do me a favor and look at this problem. It is rather elementary and the main question can be summarized as

Does there exist a bijection $f: \mathbb{R}^d \to \mathbb{R}^d$ such that

1. Whenever $X \subseteq \mathbb{R}^d$ is connected in the standard topology, so is $f(X)$
2. $f$ is not continuous?

See the link above for more details.

The question has be bothering me for a few years now; and it is sufficiently far outside my main research interest that I hardly devote any time thinking about it.

I am an assistant professor in the mathematics department at Michigan State University. My research combines analytic and geometric techniques to study nonlinear evolutionary partial differential equations that arise in physical and geometric contexts. I am particularly interested in situations where wave-like phenomena arise, such as general relativity, fluids, and the physics of elastic membranes and solids.

(All of my research articles are posted on the arXiv, and you can find them listed here.)

I have also some unpublished expository articles, you can find them here.

### Contact info

E-mail: wongwwy -at- math . msu . edu

Mailing address: Department of Mathematics, Michigan State University, 619 Red Cedar Road, East Lansing, 48824, MI

My office is in D303 Wells Hall. I am there most of the time. You can see my agenda below.

My full vitae.

### Other identities

I am active on MathOverflow. I am I am, however, not good at basketball. indexed on MathSciNet. And I have an ORCID. I also post on Google+, in addition to keeping a personal blog.

### Travel and agenda

© Willie WY Wong · Built with Poole · Last updated September 15, 2017