The publishing date of this issue's CAM Digest is exactly the last day of year 2005. We would like to take this opportunity to wish our readers a Happy New Year!

2006年就要开始了，恭祝大家新年快乐！

严宁宁 中国科学院数学与系统科学研究院
汤涛 香港浸会大学数学系
Editors of CAM-Digest