I am printing summary of a model using summary module from torch.summary.But in the result of column ‘output shape’ of MNIST dataset i am getting output as
    Layer (type)               Output Shape         Param #

================================================================
Conv2d-1           [-1, 32, 28, 28]             320
Conv2d-2           [-1, 64, 28, 28]          18,496
MaxPool2d-3           [-1, 64, 14, 14]               0
Conv2d-4          [-1, 128, 14, 14]          73,856
Conv2d-5          [-1, 256, 14, 14]         295,168
MaxPool2d-6            [-1, 256, 7, 7]               0
Conv2d-7            [-1, 512, 5, 5]       1,180,160
Conv2d-8           [-1, 1024, 3, 3]       4,719,616
Conv2d-9           [-1, 2048, 1, 1]      18,876,416
can anyone tell me what is -1 in output shape ??Thanks in advance