(Formerly Science in China Series A: Mathematics)
http://www.springerlink.com/content/1674-7283/

In this issue:

Riemann boundary value problems and reflection of shock for the Chaplygin gas
ShuXing Chen & AiFang Qu
Sci. China Math., 55(4), 2012, pp. 671-685, DOI: 10.1007/s11425-012-4393-z

Shortening filtrations
Edgar E. Enochs
Sci. China Math., 55(4), 2012, pp. 687-693, DOI: 10.1007/s11425-011-4334-2

Representation dimension for Hopf actions
JuXiang Sun & GongXiang Liu
Sci. China Math., 55(4), 2012, pp. 695-700, DOI: 10.1007/s11425-011-4315-5

Groups with the same order and degree pattern
Roya Kogani-Moghaddam & Ali Reza Moghaddamfar
Sci. China Math., 55(4), 2012, pp. 701-720, DOI: 10.1007/s11425-011-4314-6

Variational minimizing parabolic and hyperbolic orbits for the restricted 3-body problems
ShiQing Zhang
Sci. China Math., 55(4), 2012, pp. 721-725, DOI: 10.1007/s11425-011-4311-9

The reason of Hopf's and Oleinik's proofs for countability of shocks being wrong
BangHe Li
Sci. China Math., 55(4), 2012, pp. 727-729, DOI: 10.1007/s11425-012-4372-4

Affinely equivalent Kohler-Finsler metrics on a complex manifold RongMu Yan
Sci. China Math., 55(4), 2012, pp. 731-738, DOI: 10.1007/s11425-011-4343-1

Self-maps of p-local infinite projective spaces
XianZu Lin
Sci. China Math., 55(4), 2012, pp. 739-744, DOI: 10.1007/s11425-011-4335-1

Optimal variational principle for backward stochastic control systems associated with Levy processes
MaoNing Tang & Qi Zhang
Sci. China Math., 55(4), 2012, pp. 745-761, DOI: 10.1007/s11425-012-4370-6

Efficient estimation for additive hazards regression with bivariate current status data
XingWei Tong, Tao Hu & JianGuo Sun
Sci. China Math., 55(4), 2012, pp. 763-774, DOI: 10.1007/s11425-012-4381-3

Jackknifed random weighting for Cox proportional hazards model
Xiao Li, YaoHua Wu & DongSheng Tu
Sci. China Math., 55(4), 2012, pp. 775-786, DOI: 10.1007/s11425-012-4380-4

Checking for normality in linear mixed models
Ping Wu, LiXing Zhu & Yun Fang
Sci. China Math., 55(4), 2012, pp. 787-804, DOI: 10.1007/s11425-011-4352-0

A three level linearized compact difference scheme for the Cahn Hilliard equation
Juan Li, ZhiZhong Sun & Xuan Zhao
Sci. China Math., 55(4), 2012, pp. 827-840, DOI: 10.1007/s11425-011-4329-z

Analysis of a moving collocation method for one-dimensional partial differential equations
JingTang Ma, WeiZhang Huang & Robert D. Russell
Sci. China Math., 55(4), 2012, pp. 841-850, DOI: 10.1007/s11425-011-4310-x

A direct product decomposition of QMV algebras
Xian Lu, Yun Shang & RuQian Lu
Sci. China Math., 55(4), 2012, pp. 851-868, DOI: 10.1007/s11425-011-4287-5

Image space analysis for variational inequalities with cone constraints and applications to traffic equilibria
Jun Li & NanJing Huang
Sci. China Math., 55(4), 2012, pp. 869-879, DOI: 10.1007/s11425-011-4309-3

Negacyclic codes over Galois rings of characteristic 2 a 
ShiXin Zhu & XiaoShan Kai
Sci. China Math., 55(4), 2012, pp. 869-879, DOI: 10.1007/s11425-011-4309-3

Brief Reports

Algorithms for computing the global infimum and minimum of a polynomial function
ShuiJing Xiao & GuangXing Zeng
Sci. China Math., 55(4), 2012, pp. 881-891, DOI: 10.1007/s11425-011-4326-2