let me restart the slide for a moment so first first thing that happened with bits back is the thing at the bottom here this wasn't a comics of pure vision learning was not in the comics of coding next thing that happened was in the comics of Ashley making this practical as a coding scheme this idea and but this used arithmetic coding it turns out that the scheme we're going to look at is not very compatible with arithmetic coding unlike autographs of models which are almost designed to do arithmetic coding the when you have a via it's not very