# People

## Brett Tangedal

### Associate Professor

Office: Petty 112
Email: batanged@uncg.edu
Starting year at UNCG: 2007
Office Hours: MW 3:00 PM - 4:30 PM, and by appointment.

### Education

Degree(s): Ph.D. in Mathematics, University of California at San Diego (1994)

### Teaching

Spring 2020
• MAT-293 LEC (Calculus III), TR 3:30-4:45, Petty Science Building 223
• MAT-414 LEC (Theory of Numbers), TR 11:00-12:15, Petty Science Building 150
• MAT-801 DTS (Thesis Extension)

### Research

Member of the Research Group(s): Number Theory
Current Students: Stephen Steward (M.A.)
Former Students: Rick Shepherd (M.A.), Nancy Buck (M.A.)

Research Interests: I am interested in algebraic number theory with a particular emphasis on explicit class field theory. This involves the constructive generation of relative abelian extensions of a given number field using the special values of certain transcendental complex and $p$-adic valued functions. Almost all of my research to date is concerned with a system of conjectures, due to Stark and others, that make class field theory explicit in a precise manner as described above.

### Selected Publications

• Tangedal, Brett A.; Young, Paul T. Explicit computation of Gross-Stark units over real quadratic fields. J. Number Theory 133 (2013), no. 3, 1045-1061.
• Tangedal, Brett A. ; Young, Paul T. On p -adic multiple zeta and log gamma functions. J. Number Theory 131 (2011), no. 7, 1240–1257.
• Sands, Jonathan W. ; Tangedal, Brett A. Functorial properties of Stark units in multiquadratic extensions. Algorithmic number theory, 253–267, Lecture Notes in Comput. Sci., 5011, Springer, Berlin, 2008.
• Tangedal, Brett A. Continued fractions, special values of the double sine function, and Stark units over real quadratic fields. J. Number Theory 124 (2007), no. 2, 291–313.
• Dummit, David S. ; Tangedal, Brett A. ; van Wamelen, Paul B. Stark’s conjecture over complex cubic number fields. Math. Comp. 73 (2004), no. 247, 1525–1546 (electronic).

### Brief Biography

Dr. Tangedal earned his Ph.D. from the University of California at San Diego in 1994 under the direction of Harold Stark. After holding various positions at the University of Vermont, Clemson University, and the College of Charleston, he joined the faculty at UNCG in 2007. His research interests lie in algebraic number theory with a particular emphasis on explicit class field theory. This involves the constructive generation of relative abelian extensions of a given number field using the special values of certain transcendental complex and p-adic valued functions. Almost all of his research to date is concerned with a system of conjectures, due to Stark and others, that make class field theory explicit in a precise manner using the special values mentioned above.