Hello, I'm using boost::multi_array for a while and find it very powerful except one point that I cannot specify an array_view's number of dimentions at runtime. But this pity is not the topic of this post. You know one can create an array_view with arbirary given start/bound indices as well as the stride as follows: typedef boost::multi_array<T, 3> array_t; array_t myarray; //... typedef array_t::index_range range_t; typename array_t::array_view::view<2> myview = myarrray[boost::indices[range_t(0, 8, 2)][rang_t()][1]]; As I don't know in the internal of the lib how the dound guarding of iteration is done, either - in the 'standard' STL manner as i!=bound; or - in the 'conventional' C stale as i<bound my concern is in case that one advetently specify 'range_t(0, 8, 2)' as range_t(0, 7, 2), if this error cause undefined behavior, or is as save as it correct form, or, seemingly impossible, detected at runtime or even compile time? Thanks for any concern. Best regards Max ------------------------------------------------------------------- 新浪空间——与朋友开心分享网络新生活！(http://space.sina.com.cn/ )