Hi, can I use vector_slice / vector_range from uBLAS for std::vector or std::deque ? Or any other library can do it? I can't use iterator based libs (like boost::range or boost::range + step_iterator) as I want to hold view even after a few push_back & pop_front , as long as no element gets remove from within my view window. If elements gets removed from view window,any behavior is fine for me .. but if the case is not so , I want the range/slice view to hold the proper elements irrespective of iterator invalidation due to push_back/pop_front. Thanks abir