independent identically distributed and you don't know what the analytical following the distribution is where you assume that it is some complicated distribution and you just keep sampling multiple points repeatedly and from stochastic rain descent optimized objective now what is semis corresponding assume that you have an unlabeled data set tu where X is sample from P of X which is a marginal responding to the Joint Distribution from the label data set sample from so you have D you the unlabeled data set and D s the label ta set and your goal