Transient stabilty constrained interior pt. optimal power flow, J. Quanyuan Two problem sets from Dr. Jiang Quanyuan from Zhejiang University, Hangzhou, China, March, 2008, used in an electrical power system. Each matrix A is solved sequentially with two right-hand-sides, b1 and b2, one at a time. In the UF collection, the sequence of all first and second right-hand-sides is in Problem.aux.b2 and Problem.aux.b1. These matrices are symmetric indefinite (x=A\b uses MA57). Note that the last matrices in the sequence are ill-conditioned. Transient Stability Constrained Interior Point Optimal Power Flow Program Version 1.0 -- Developed by Dr. Jiang Quanyuan, March 2008 case9.m - TSOPF converges after 12 iterations object = 3.945939E+03 max_equ = 3.287326E-11 low_inequ = None up_inequ = None case39.m - TSOPF converges after 13 iterations object = 2.696268E+04 max_equ = 5.684342E-14 low_inequ = -1.110223E-16 up_inequ = None