1This paper reports research undertaken as an REU (Research Experience for Undergraduates) projects at Hope College under the direction of the first author. The project was supported in part by a National Science Foundation grant(DMS-9619402).
Notes
1This paper reports research undertaken as an REU (Research Experience for Undergraduates) projects at Hope College under the direction of the first author. The project was supported in part by a National Science Foundation grant(DMS-9619402).