Andrew Scott Obus
Assc Professor
Weissman School of Arts and Sciences
- Biography
- Teaching
- Research and Creative Activity
- Grants
- Honors and Awards
- Service
Education
Ph.D., Mathematics, University of Pennsylvania Philadelphia PA
AB, Mathematics, Harvard College Cambridge MA
Semester | Course Prefix | Course Number | Course Name |
---|---|---|---|
Fall 2023 | MATH | 90000 | Dissertation Supervision |
Fall 2023 | MTH | 4010 | Mathematical Analysis I |
Fall 2023 | MATH | 89902 | Independent Research |
Fall 2023 | MTH | 5000 | Independent Study Math I |
Spring 2023 | MATH | 89902 | Independent Research |
Spring 2023 | MATH | 90000 | Dissertation Supervision |
Fall 2022 | MTH | 4100 | Linear Alg & Matrix Methods |
Fall 2022 | MATH | 87700 | ST: Groups, Rings and Algebras |
Fall 2022 | MATH | 90000 | Dissertation Supervision |
Spring 2022 | MATH | 90000 | Dissertation Supervision |
Spring 2022 | MTH | 4010 | Mathematical Analysis I |
Spring 2022 | MTH | 3035 | Vector Calculus |
Fall 2021 | MATH | 90000 | Dissertation Supervision |
Spring 2021 | MATH | 90000 | Dissertation Supervision |
Fall 2020 | MATH | 90000 | Dissertation Supervision |
Fall 2020 | MATH | 89902 | Independent Research |
Fall 2020 | MTH | 3006 | Elements of Calculus II |
Spring 2020 | MATH | 89902 | Independent Research |
Spring 2020 | MTH | 6002H | Honors - MATH II |
Spring 2020 | MTH | 4000 | Bridge to Higher Mathematics |
Spring 2020 | MTH | 4009 | Proof Writing for Mth Analysis |
Spring 2020 | MTH | 4009 | Proof Writing for Mth Analysis |
Fall 2019 | MTH | 6001H | Honors - MATH I |
Fall 2019 | MTH | 3020 | Calculus III |
Fall 2019 | MTH | 3030 | Elements of Calculus III |
Spring 2019 | MTH | 4000 | Bridge to Higher Mathematics |
Fall 2018 | MTH | 2205 | Precal and Elements of Cal 1B |
Fall 2018 | MTH | 4500 | Intro Financial Math |
Books
Obus, A. (2009). Ramification of primes in fields of moduli of three-point covers. (p. 139). ProQuest LLC, Ann Arbor, MI.
Journal Articles
(2023). Conductor-discriminant inequality for hyperelliptic curves in odd residue characteristic. Interational Math. Res. Notices, 13 pp..
Dang, H., Das, S., Karagiannis, K., Obus, A., & Thatte, V. (2022). Local Oort groups and the isolated differential data criterion. JOURNAL DE THEORIE DES NOMBRES DE BORDEAUX, 34(1). 251-269.
(2022). Explicit minimal embedded resolutions of divisors on models of the projective line. Res. Number Theory, 8(2). Paper No. 27, 27.
(2021). Stabilization indices of potentially Mumford curves. 33 pp..
(2021). Superelliptic curves with many automorphisms and CM Jacobians. Math. Comp., 90(332). 2951--2975.
(2020). Explicit resolution of weak wild quotient singularities on arithmetic surfaces. J. Algebraic Geom., 29(4). 691--728.
(2019). Reduction of dynatomic curves. Ergodic Theory Dynam. Systems, 39(10). 2717--2768.
(2018). The $abc$ conjecture implies the weak diversity conjecture. Albanian J. Math., 12(1). 8--14.
(2018). Abhyankar's conjectures in Galois theory: current status and future directions. Bull. Amer. Math. Soc. (N.S.), 55(2). 239--287.
(2017). A generalization of the Oort conjecture. Comment. Math. Helv., 92(3). 551--620.
(2017). Good reduction of three-point Galois covers. Algebr. Geom., 4(2). 247--262.
(2016). The local lifting problem for $A_4$. Algebra Number Theory, 10(8). 1683--1693.
(2016). Wild ramification kinks. Res. Math. Sci., 3. Paper No. 21, 27.
(2014). Conductors of wild extensions of local fields, especially in mixed characteristic $(0,2)$. Proc. Amer. Math. Soc., 142(5). 1485--1495.
(2014). Cyclic extensions and the local lifting problem. Ann. of Math. (2), 180(1). 233--284.
(2013). On Colmez's product formula for periods of CM-abelian varieties. Math. Ann., 356(2). 401--418.
(2013). Fields of moduli of three-point $G$-covers with cyclic $p$-Sylow, II. J. Th'eor. Nombres Bordeaux, 25(3). 579--633.
(2012). Vanishing cycles and wild monodromy. Int. Math. Res. Not. IMRN, (2). 299--338.
(2012). Fields of moduli of three-point $G$-covers with cyclic $p$-Sylow, I. Algebra Number Theory, 6(5). 833--883.
(2010). Wild tame-by-cyclic extensions. J. Pure Appl. Algebra, 214(5). 565--573.
Book Chapters
(2019). Lifting of curves with automorphisms. Open Problems in Arithmetic Algebraic Geometry (pp. 9--59). Int. Press, Somerville, MA.
(2017). Unramified Brauer classes on cyclic covers of the projective plane. Progr. Math. (pp. 115--153). Birkh"auser/Springer, Cham.
(2013). Toward Abhyankar's inertia conjecture for $PSL_2(l)$. S'emin. Congr. (pp. 195--206). Soc. Math. France, Paris.
(2012). The (local) lifting problem for curves. Adv. Stud. Pure Math. (pp. 359--412). Math. Soc. Japan, Tokyo.
Media Contributions
(2020). Notices of the American Mathematical Society.
Presentations
Obus, A. S. (2024, June 20). Mac Lane valuations and Le Borgne's improvement of Ax's theorem.. Recent trends in algebra, geometry, and arithmetic. Vlora, Albania (on Zoom): Research Institute of Science and Technology.
Obus, A. S. (2024, October 20). Mac Lane Valuations and Applications to Conductor-Discriminant Inequalities. Columbia Automorphic Forms and Arithmetic Geometry Seminar. : Columbia University.
Obus, A. S. (2024, November 20). Fun With Mac Lane Valuations. Algebra Seminar. : Wesleyan University.
Obus, A. (2021, January 31). Superelliptic curves with many automorphisms and CM Jacobians. Joint Meetings of the AMS/MAA. Online: American Mathematical Society.
Obus, A. (2021, January 31). Conductor-discriminant inequalities for superelliptic curves. AMS/MAA Joint Meetings. Online: American Mathematical Society.
Obus, A. (2021, November 30). Mac Lane valuations and an application to weak wild quotient singularities. VIASM Algebraic Geometry Seminar. Online: Vietnam Institute for Advanced Studies in Mathematics (VIASM).
Obus, A. (2021, February 28). Fun with Mac Lane valuations. Heilbronn Number Theory Seminar. Online: University of Bristol.
Obus, A. (2020, February 28). Conductor-Discriminant Inequalities for Hyperelliptic Curves. Algebra and Number Theory Seminar. Hanover, NH: Dartmouth College.
Obus, A. (2020, March 31). Superelliptic Curves: Many Automorphisms vs. Complex Multiplication. AMS Southeastern Sectional Meeting (Cancelled). Charlottesville, VA: American Mathematical Society.
Obus, A. (2020, February 28). Characteristic 0 vs. Characteristic p: Galois covers of curves. CUNY Graduate Center Colloquium. CUNY Graduate Center: CUNY Graduate Center.
Obus, A. (2020, January 31). Mac Lane Valuations and an Application to Resolution of Wild Quotient Singularities. Number Theory Seminar. Athens, GA: University of Georgia.
Obus, A. (2019, April 30). Dynatomic curves: the good, the bad, and the irreducible. Colloquium. Dalhousie University, Halifax, Nova Scotia: Dalhousie University.
Obus, A. (2019, April 30). The Life and Mathematics of Évariste Galois. Feliks Gross Award Ceremony. CUNY Graduate Center: CUNY Academy.
Obus, A. (2019, February 28). Fun with Mac Lane valuations. Emory University Algebra Seminar. Atlanta, GA: Emory University.
Obus, A. (2019, February 28). Fun with Mac Lane valuations. Georgia Institute of Technology Algebra Seminar. Atlanta, GA: Georgia Institute of Technology.
Obus, A. (2019, April 30). Conductor-discriminant inequalities for hyperelliptic curves. AMS Spring Sectional Meeting. Hartford, CT: American Mathematical Society.
Obus, A. (2019, April 30). Mac Lane valuations, conductors, and discriminants. Algebra Seminar. Charlottesville, VA: University of Virginia.
Obus, A. (2019, May 31). Fun with Mac Lane Valuations. Algebraic Geometry Seminar. Stony Brook, NY: Stony Brook University.
Obus, A. (2019, June 30). "Abhyankar's conjectures". AMS Math Research Community "Explicit Algebraic Geometry in Characteristic p". Whispering Pines, RI: American Mathematical Society.
Obus, A. (2019, November 30). Conductor-Discriminant Inequalities for Hyperelliptic Curves. Galois Seminar. Philadelphia, PA: University of Pennsylvania.
Obus, A. (2018, April 30). Reduction of dynatomic curves: The good, the bad, and the irreducible. IDA/CCS Colloquium. Bowie, MD: Institute fo Defense Analyses, Center for Computing Sciences.
Obus, A. (2018, September 30). Explicit resolution of weak wild quotient singularities. Algebra Seminar. University of Virginia: Unviersity of Virginia.
Obus, A. (2018, March 31). Reduction of dynatomic curves: The good, the bad, and the irreducible. Ohio State University Number Theory Seminar. Columbus, OH: Ohio State University.
Obus, A. (2018, February 28). Reduction of dynatomic curves: The good, the bad, and the irreducible. Baruch College Special Colloquium. New York, NY: Baruch College (CUNY).
Obus, A. (2018, February 28). Reduction of dynatomic curves: The good, the bad, and the irreducible. Queens College Special Colloquium. Queens, NY: Queens College (CUNY).
Obus, A. (2018, January 31). Abhyankar's conjectures on Galois covers of the affine line; or, if you can't prove that something doesn't exist, does it exist?. Bryn Mawr College Special Colloquium. Bryn Mawr, PA: Bryn Mawr College.
Obus, A. (2018, March 31). Explicit resolution of weak wild quotient singularities. AMS Central Sectional Meeting. Columbus, OH: AMS.
Obus, A. (2018, November 30). Explicit resolution of weak wild quotient singularities. Binghamton University Algebra Seminar. Binghamton, NY: Binghamton University.
Obus, A. (2018, October 31). Conductor-Discriminant inequalities for hyperelliptic curves. AMS Central Sectional Meeting. Ann Arbor, MI: AMS.
Obus, A. (2017, May 31). Hurwitz Trees and Lifting. Simons Symposium on Tropical and Non-Archimedean Geometry. Elmau, Germany: Simons Foundation.
Obus, A. (2017, July 31). Reduction of Dynatomic Curves. Conference on the Algebraic and Analytic Theory of Quadratic Forms. University of Georgia: University of Geoergia.
Obus, A. (2016, September 30). An introduction to frobenioids. Kummer Classes and Anabelian Geometry. University of Vermont: University of Vermont.
Obus, A. (2015, December 31). The local lifting problem for A_4. Conference on Algebraic Geometry. Bangalore, India: ISI-Bangalore.
Obus, A. (2014, June 30). The local lifting problem. AMS/IMU Joint Meetings. Tel Aviv, Israel: AMS/IMU.
Obus, A. (2014, October 31). Cyclic extensions and the local lifting problem. Valuation theory and its applications. Oberwolfach, Germany: Oberwolfach Mathematical Institute.
Obus, A. (2013, June 30). Lifting of cyclic extensions. Arithmetic of Fields. Oberwolfach, Germany: Oberwolfach Mathematical Institute.
Obus, A. (2012, June 30). Cyclic extensions and the local lifting problem. Galois Covers and Deformations. Bordeaux, France: University of Bordeaux.
Obus, A. (2012, June 30). Cyclic extensions and the local lifting problem. Dutch Intercity Number Theory Seminar. University of Utrecht: University of Utrecht.
Obus, A. (2012, February 28). Cyclic extensions and the local lifting problem. Winter School on Galois Theory. Luxembourg: University of Luxembourg.
Obus, A. (2010, March 31). Fields of moduli of three-point covers. Differential and Geometric Galois Theory. Luminy, France: Centre International de Recherche en Mathématiques.
Obus, A. (2010, October 31). Toward the Oort conjecture. Galois Theory and Arithmetic Geometry. Kyoto, Japan: University of Kyoto/RIMS.
Obus, A. (2009, February 28). Fields of moduli of three-point covers. Arithmetic of Fields. Oberwolfach, Germany: Oberwolfach Mathematical Institute.
Title | Funding Agency Sponsor | Start Date | End Date | Awarded Date | Total Funding | Status |
---|---|---|---|---|---|---|
Conductor-Discriminant Inequalities for Hyperelliptic Curves | PSC-CUNY 51 | 07/01/2020 | 12/31/2022 | 04/17/2020 | 3500 | Completed |
Conductor-Discriminant Inequalities for Hyperelliptic Curves | PSC-CUNY 50 | 07/01/2019 | 06/30/2022 | 04/15/2019 | 3500 | Completed |
Branched Galois Covers of Curves: Lifting and Reduction | National Science Foundation | 09/01/2018 | 07/31/2020 | 09/01/2018 | 28786 | Completed |
CAREER: Models of curves and non-archimedean geometry | National Science Foundation | 07/01/2021 | 06/30/2036 | 07/01/2021 | 473067 | Funded - In Progress |
Models of curves and valuation theory | Simons Foundation | 09/01/2020 | 08/31/2022 | 06/22/2020 | 42000 | Funded - In Progress |
Models of Curves and Non-Archimedean Geometry | National Science Foundation | 07/01/2021 | 06/30/2024 | 258850 | Withdrawn |
Honor / Award | Organization Sponsor | Date Received | Description |
---|---|---|---|
Feliks Gross Award | CUNY Academy for the Humanities and Sciences | 2019 | Given to CUNY assistant professors in humanities/sciences in recognition of outstanding research/research potential. $500 |
All-University Teaching Award | University of Virginia | 2015 | Given to 9 faculty each year across the entire university. $2000. |
Carlitz-Zippin Prize | University of Pennsylvania Math Department | 2009 | Given for best Ph.D. Thesis in math department. $750. |
Good teaching award, University of Pennsylvania | University of Pennsylvania Math Department | 2007 | Given for overall teaching evaluation score of at least 3.5 on a 4.0 scale. |
Honorable Mention, Penn Prize for Excellence in Teaching | University of Pennsylvania, Graduate School of Arts and Sciences | 2006 | Given to graduate student TAs for excellence in teaching. |
College
Committee Name | Position Role | Start Date | End Date |
---|---|---|---|
Peer Observation | Committee Member | Present | |
New Faculty Mentoring | Co-Leader of pod | Present |
University
Committee Name | Position Role | Start Date | End Date |
---|---|---|---|
Colette LaPointe | Faculty Advisor | 8/1/2020 | Present |
George Mitchell | Faculty Advisor | 8/1/2019 | Present |
James Myer | Faculty Advisor | 1/1/2020 | Present |
PSC-CUNY Research Award Reviewer | Grant Proposal Reviewer, Internal | 1/1/2021 | 12/31/2022 |
Professional
Organization | Position Role | Organization State | Organization Country | Start Date | End Date | Audience |
---|---|---|---|---|---|---|
Referee | Reviewer, Journal Article | 1/1/2010 | Present | |||
Sima Zabanfahm's Thesis Defense | External Appraiser | 8/9/2023 | 8/9/2023 | International | ||
National Science Centre, Poland | Reviewer, Grant Proposal | Poland | Poland | 6/1/2022 | 6/16/2022 | International |
American Mathematical Society | Workshop Organizer | Virginia | United States | 3/13/2020 | 3/15/2020 | |
American Mathematical Society | Senior Advisor-in-Residence for workshop | Rhode Island | United States | 6/16/2019 | 6/21/2019 | |
Elliptic Curves, Torsors, and L-Functions | Workshop Organizer | Virginia | United States | 3/24/2017 | 3/29/2017 | |
NSF | Reviewer, Grant Proposal | Virginia | United States | 11/1/2016 | 12/31/2016 | |
Lifting Problems and Galois Theory | Workshop Organizer | Alberta | Canada | 8/15/2015 | 8/20/2015 |
Public
Organization | Position Role | Organization State | Organization Country | Start Date | End Date | Audience |
---|---|---|---|---|---|---|
The I-HELP Liberia project | Board Member | New York | United States | 6/1/2011 | Present | International |