NIU math: Ben Wallis

my cv

about me

Research interests: Banach space theory, especially Tsirelson-like and other sequence spaces, almost-invariant halfspaces, and operator ideals.

Publications:
The almost-invariant halfspace problem (Ph.D. dissertation), in prerparation.
"Sequence singular operators" (with Gleb Sirotkin), in preparation.
"Constructing Banach ideals using upper $\ell_p$-estimates," to appear in Extracta Mathematicae. (preprint)
"The structure of almost-invariant half-spaces for some operators" (with Gleb Sirotkin), Journal of Functional Analysis, Vol. 267, Iss. 7 (2014 Oct 01), pp2298-312.

Talks:
2014 Oct 07, "The almost-invariant halfspace problem" (joint with Gleb Sirotkin), seminar talk, Northern Illinois University, Dekalb, IL, USA.
2014 Sep 27, "Constructing Banach ideals using upper $\ell_p$-estimates," Wabash annual miniconference, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA. (pdf)
2014 May 23, "Schreier-supported upper $\ell_p$-estimates on Banach space operators," Seventh conference on function spaces, Southern Illinois University---Edwardsville, Edwardsville, IL, USA. (pdf)
2014 Mar 07, "The almost-invariant halfspace problem" (joint with Gleb Sirotkin), seminar talk, University of Alberta, Edmonton, AB, Canada.
2013 Sep 28, "The almost-invariant halfspace problem" (joint with Gleb Sirotkin), Wabash annual miniconference, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA.

Referee experience:
Referee for Positivity (2014-present)

Teaching experience:
At NIU: MATH 101 (Topics in Math), 109p (Chance Program Fundamentals of Math II), 110p (Chance Program College Algebra), 155 (Trig/Precalculus), 201 (Foundations of Elementary School Math), 211 (Business Calculus), and 229 (Calculus I).
At Kishwaukee College: MAT 096 (Algebra I), 097 (Geometry), 098 (Algebra II), and 150 (College Algebra).

For questions or comments, you can contact me via email: wallis@math.niu.edu

Last updated: 2014 Dec 26