Fedor (Fedya) Manin
I am a Research Visiting Assistant Professor (postdoc) in mathematics at the Ohio State University. I got my PhD in 2015 at the University of Chicago, where my advisor was Shmuel Weinberger; from 2015 to 2017 I was at the University of Toronto.
email: manin.4 osu edu(add appropriate punctuation)
office: MA 318
Department of Mathematics
231 W. 18th Ave.
Columbus, OH 43210
USA
Research Interests
I am mostly motivated by problems in quantitative geometry and topology. 20thcentury topology has produced a trove of results asserting the existence of certain objectsfor example, homotopy classes of maps, cobordisms, embeddings of manifolds. However, these algebraic results place no bounds, or very large bounds, on how complicated such objects must be. In some cases, as in anything connected to fundamental groups, such objects may even be uncomputably large in general. In other cases, they may be polynomial or even linear in size in terms of some available data.
Such questions are similar in nature, but not identical, to the question: how computationally difficult are such objects to produce? Here again, one may consider both computability and computational complexity.
Geometric group theory, when thought of as the study of fundamental groups of spaces, is motivated by a similar philosophy, and forms part of my range of interests.
Papers
All my papers can also be found on the arXiv.
A zoo of growth functions of mapping class sets,
arXiv preprint arXiv:1805.12575 (May 31, 2018), submitted. 
Integral and rational mapping classes
(with Shmuel Weinberger),
arXiv preprint arXiv:1802.05784 (February 15, 2018), submitted. 
Plato's cave and differential forms,
arXiv preprint arXiv:1801.00335 (December 31, 2017), submitted. 
Quantitative nullhomotopy and rational homotopy type
(with Greg Chambers and Shmuel Weinberger),
Geometric and Functional Analysis (GAFA), to appear. 
Quantitative nullcobordism
(with Greg Chambers, Dominic Dotterrer, and Shmuel Weinberger),
accepted for publication in the Journal of the AMS.
Appendix: The Gromov–Guth–Whitney embedding theorem
(with Shmuel Weinberger).

Appendix: The Gromov–Guth–Whitney embedding theorem

Volume distortion in homotopy
groups
(based on about twothirds of my PhD thesis, which also has some other stuff in it),
Geometric and Functional Analysis (GAFA), Vol. 26 Issue 2 (April 2016) pp 607–679. 
The complexity of nonrepetitive
edge coloring of graphs,
(based on undergraduate research with Chris Umans in 2006–2007)
arXiv preprint arXiv:0709.4497.
Presentations
Like most mathematicians, I prefer to give talks on the blackboard. For very short talks, though, this can be infeasible, and so I've occasionally given slide talks.
At the 50th Spring
Topology and Dynamics Conference in Waco, Texas, I highlighted a geometric
group theory aspect of my paper “Volume distortions in homotopy groups”:
Directed filling functions and the
groups ♢_{n}
At the 2016
Workshop in Geometric Topology in Colorado Springs, I spoke about an
ongoing project with Shmuel Weinberger studying geometric bounds on smooth and
PL embeddings of manifolds:
Counting embeddings
A draft proof of “Gromov's theorem for diagrams” is available upon request.
Code
Here is some code I wrote in Sage implementing the edgewise subdivision of a simplicial complex, due to Edelsbrunner and Grayson.Teaching
In Fall 2018 I will be teaching MATH 5801, General topology and knot theory.
In Spring 2018 I taught MATH 2568, Linear algebra, sections 0020 and 0075. Most materials for that course can be found here.
At the University of Toronto, I taught:
MAT 137,
Calculus! (2015–2016 and 2016–2017).
 MATH 152–153, Calculus II and III (2014–2015)
 MATH 196, Linear algebra (Winter 2014 and Spring 2012)
 MATH 195, Mathematical methods for the social sciences (a multivariable calculus class; Fall 2013, Winter 2013, Fall 2012)
 MATH 131–132, Elementary functions and calculus I and II (2011–2012)