We consider testing graph expansion in the bounded-degree graph model. Specifically, we refer to algorithms for testing whether the graph has a second eigenvalue bounded above by a given threshold or is far from any graph with such (or related) property. We present a natural algorithm aimed towards achieving the foregoing task. The algorithm is given a (normalized) eigenvalue bound λ < 1, oracl...

Regression testing is expensive and essential part of an effective testing process, for achieving quality of the software and for gaining confidence in modified software.This is a very expensive activity work in maintenance phase. In regression testing model based regression testing used for modification in models. According to model based regression testing the scalability problem in code base...