## Robert Powers' Home Page

*Office*: Room 4N73 in David Rittenhouse Laboratory

*Telephone*: 215 898-8464 ( Math. Dept. Office 898-8627 )

*Fax* 215 898-2010

*E-mail*: ` rpowers@math.upenn.edu`

*Office Hours*: Tues. Thurs 2:30-3:00 and after class
or by appointment
## Math 240 Tues-Thurs 3:00-4:20 DRL A4

## Exponential of a real (3 x 3)-matrix with repeated roots
and Green's function for 2d order linear differential equation
with constant coefficients.

## Recent Paper on CP-FLOWS (New York Journal 9 (2003) pp 165-270)

## Recent Paper on Construction of E-0-semigroups from CP-Flows

(Contemporary Math: Advances in Quantum Dynamics 365 (2004) pp 281-298)