PoolingLayer
PoolingLayer[sz] represents a pooling net layer using kernels of size sz.
PoolingLayer[{w}] represents a layer performing one-dimensional pooling with kernels of size w.
PoolingLayer[{h,w}] represents a layer performing two-dimensional pooling with kernels of size h×w.
PoolingLayer[{h,w,d}] represents a layer performing three-dimensional pooling with kernels of size h×w×d.
PoolingLayer[kernel,stride] represents a layer that uses stride as the step size between kernel applications.
PoolingLayer[kernel,opts] includes options for other pooling methods, padding and other parameters.
Please visit the official Wolfram Language Reference for more details and examples on core symbols.