which is applied throughout the entire day and since we apply one kernel to a single input channel we require M such DK cross DK cross one kernels over the entire input volume F for each of these M convolutions we end up with an output DG cross DG cross one in shape now stacking these outputs together we have an output volume of G which is of shape DG cross DG cross M this is the end of the first phase that is the end of depth wise convolution now this is succeeded by point wise convolution point wise convolution involves performing the