Downsampling with the number of feature maps fixed After each convolution block, we perform max-pooling with size 3 and stride 2.
the pooling layer produces a new internal representation of a document by taking the component-wise maximum over 3 contiguous internal vectors, representing 3 overlapping text regions, but it does this only for every other possible triplet (stride 2) instead of all the possible triplets (stride 1).