NIU math: Ben Wallis

my cv

about me

Research interests: My primary area of interest lies in Banach space theory, with a current focus in the study of almost-invariant halfspaces, Tsirelson-type spaces and their variants, and operator ideals.

Publications:
"Constructing Banach ideals using upper \ell_p-estimates," Extracta Mathematicae, Vol. 29, No. 1-2 (2014), pp73-95. (pdf)
"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.

Submitted Publications:
"Classes of operators determined by ordinal indices" (with Kevin Beanland, Ryan Causey, and Daniel Freeman). arXiv:1507.06285v1 [math.FA] (pdf)
"Closed ideals in \mathcal{L}(X) and \mathcal{L}(X^*) when X contains certain copies of \ell_p and c_0." arXiv:1507.03241v1 [math.FA] (pdf)

Talks:
2015 Jun 09, "Constructing Banach ideals using upper \ell_p-estimates," Relations Between Banach Space Theory and Geometric Measure Theory, University of Warwick, Coventry, UK. (youtube)
2015 Mar 03, "Constructing Banach ideals using upper \ell_p-estimates," seminar talk, Northern Illinois University, Dekalb, IL, USA.
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), 229 (Calculus I), and 230 (Calculus II).
At Kishwaukee College: MAT 096 (Algebra I), 097 (Geometry), 098 (Algebra II), 150 (College Algebra), and 220 (Business Statistics).

For questions or comments, you can contact me via email: z1019463@students.niu.edu

Last updated: 2015 Jul 14