Chen, Gao and Guo gave in a recent paper many interesting identities involving hook lengths of trees and forests using an extension of Han’s expansion technique. We give combinatorial proofs of some of these identities.

Yi-Xing Li,1 Ming-Hua Li,1 Shi-Hong Fu, Wei-Xin Chen, Qi-Yong Liu, Hai-Lin Zhang, Wa Da, Song-Lin Hu, Sang Dan La Mu, Ju Bai, Zun-Dong Yin, Hong-Yue Jiang, Yu-Hong Guo, Dun Zhu Duo Ji, Hui-Mei Xu, Ge Li, Gu Gu Cuo Mu, Hui-Ming Luo, Jing-Lin Wang, Jun Wang, Xiu-Min Ye, Zhuo Ma Yang Jin, Wei Zhang, Gui-Jun Ning, Huan-Yu Wang, Gui-Chang Li, Jian Yong, Xiao-Feng Liang, and Guo-Dong Liang Author aff...

a nonstandard finite difference (nsfd) scheme has been constructed and analyzed for a mathematical model that describes lotka–volterra food web model. this new discrete system has the same stability properties as the continuous model and,on the whole, it preservesthe same local asymptotic stability properties. linearized stability theory and schur–cohn criteria are used for local asymptoticstab...

Correction for 'Photoredox-mediated Minisci C-H alkylation of N-heteroarenes using boronic acids and hypervalent iodine' by Guo-Xing Li et al., Chem. Sci., 2016, DOI: ; 10.1039/c6sc02653b.

Shaohan Guo, Yuhong Chen, Yan Huo, Congcong Zhao, Kun Zhang, Xiaoling Mingzhe Liu, Zhenjie Hu

In this issue of Neuron, Guo et al. (2014) optogenetically probe contributions of different cortical regions to tactile sensory perception, finding that somatosensory cortex is necessary for acquisition of sensory information and frontal cortex is necessary for planning motor output.

The chemical name of the title compound in the paper by Xu, Huang & Guo [Acta Cryst. (2009), E65, o846] is corrected and the structural diagram is updated.[This corrects the article DOI: 10.1107/S1600536809010101.].