This is not a review, simply a question with regard to the default_random_generator constructor. If I'm reading random.hpp correctly, there is no way for a user to provide the seed value - a useful feature for folks like myself that use PRNGs to model stochastic processes. We frequently need to repeat a particular sequence of 'random numbers'. Any chance the seed could be passed as a parameter defaulted to the existing hard coded time/clock? As long as I'm asking, perhaps the ability to provide a special-purpose generator of our own design? I'd also like to express my appreciation for the effort you've obviously expended on this project. Thank you. Dick Bridges Western Digital Technologies, Inc. The opinions and data in this missive are my own and do not necessarily represent Western Digital positions, strategies, or opinions.