Hi. Sorry, but I uploaded new files to vault, and the radix_sort has been extrememly imporved by a huge extent, and radix_quicksort has been improved too, but not to such a large extent. Mainly, for radixsort, I added support for random access iterators and support for users to pass their own functions. I also added the user-functions to radix_quicksort, but ahve not yet implemented iterators for that.