Andrew Ledoan

Visiting Assistant Professor


Department of Mathematics
University of Rochester
908 Hylan Building
Rochester, NY 14627-0138 USA

Phone: (585)275-4424
Fax: (585)273-4655
E-mail: ledoan at math dot rochester dot edu

(E-mail is the best way to reach me.)


General Information

I am a visiting assistant professor in the Department of Mathematics at the University of Rochester. My postdoctoral adviser is Professor S. M. Gonek. I study analysis and number theory, especially sequences, prime numbers, and L-functions. I am, also, a reviewer for Mathematical Reviews/MathSciNet and Zentralblatt MATH. I completed my Ph.D. in mathematics in May 2007, under the direction of Professor A. Zaharescu, at the University of Illinois at Urbana-Champaign. Before starting graduate school I was a student of Professor D. A. Goldston at San José State University.

My Teaching

I enjoy solving problems, teaching mathematics on various levels, and helping students. There are many new ideas and methods for teaching and learning. (I am a beginner in trying new methods.) I have taught the following courses at the University of Rochester.

In Fall 2008 I will be an instructor for the following two courses:

My office hours for MTH140A are Mondays and Wednesdays 1600-1730, Fridays 1100-1230, and by appointment. My office hours for MTH210 are Tuesdays and Thursdays 1000-1130, and by appointment. I check my e-mails often. So e-mail is the best way to reach me.

My Research

  1. (with C. Gugg) Computations on integers of the form $p+g^k$, in preparation.
  2. (with S. M. Gonek) Zeros of partial sums of the Riemann zeta-function, submitted for publication.
  3. (with E. Alkan, A. Zaharescu) Asymptotic behavior of the irrational factor, Acta Math. Hungar., DOI 10.1007/s10474-008-7212-9 (online, September 2008).
  4. (with E. Alkan, M. Vajaitu, A. Zaharescu) On the index of fractions with square-free denominators in arithmetic progressions, The Ramanujan Journal, DOI 10.1007/s11139-007-9103-z (online, July 2008).
  5. (with E. Akan, A. Zaharescu) On Dirichlet $L$-functions and the index of visible points, Illinois J. of Math., Vol. 51, No. 2 (Summer 2007), 455-477.
  6. (with E. Alkan, M. Vajaitu, A. Zaharescu) Discrepancy of sets of fractions with congruence constraints, Rev. Roumaine Math. Pures Appl. 51 (2006), no. 3, 265-276.
  7. (with E. Alkan, A. Zaharescu) A parity problem on the free path length of a billiard in the unit square with pockets, Funct. Approx. Comment. Math., Vol. 35 (2006), 19-36.
  8. (with E. Alkan, M. Vajaitu, A. Zaharescu) Discrepancy of fractions with divisibility constraints, Monatshefte für Mathematik, Vol. 149 (2006), DOI 10.1007/s00605-006-0383-y, No. 3, 179-192.

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