Jacobian matrix from a computational chemistry problem, iChem, China'
Lingyi Meng, Collaborative Innovation Center of Chemistry for
Energy Materials (iChem), Xiamen University, Fujian, China,
www.2011-ichem.org.  The matrix is complex, and has a sparse
and real right-hand-side.

References:
Lingyi Meng, ChiYung Yam, SiuKong Koo, Quan Chen, Ngai Wong, and
GuanHua Chen, Dynamic Multiscale Quantum Mechanics/Electromagnetics
Simulation Method, J. of Chemical Theory and Computation, 2012,
vol 8, pp 1190-1199, dx.doi.org/10.1021/ct200859h

Lingyi Meng, Zhenyu Yin, ChiYung Yam, SiuKong Koo, Quan Chen,
Ngai Wong, and GuanHua Chen, Frequency-domain multiscale quantum
mechanics/electromagnetics simulation method, J. of Chemical
Physics 139, 244111 (2013); doi: 10.1063/1.4853635