sum(), prod() and cartesian_prod() in PyTorch

sum() can get one or more sum values as shown below:

*Memos:

• 
  sum() can be used with torch or a tensor.


• The tensor of zero or more integers, floating-point numbers, complex numbers or boolean values can be used.


• A 0D or more D tensor can be used.


• The 2nd argument(int, tuple of int or list of int) with torch or the 1st argument(int, tuple of int or list of int) with a tensor is dim(Optional) which is a dimension.


• The …

integers memos numbers prod pytorch sum tensor torch values