availability of GPUs which allowed to run those systems really quickly but you all know this and what you all know also is that there's been an inflation in a number of layers using in those networks over the over the years where you know some of the workhorse of image recognition nowadays is you know some sort of backbone convolutional net similar to resonate for example so ResNet is a composition on that where every pair of layers I mean a block or residual block I'm sure again many of you have heard of this but you basically