mul in PyTorch

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*Memos:

• My post explains add().
• My post explains sub().
• My post explains div().
• My post explains remainder().
• My post explains fmod().

mul() can do multiplication with two of the 0D or more D tensors of zero or more elements or scalars or the 0D or more D tensor of zero or more elements and a scalar. getting the 0D or more D tensor of zero or more elements as shown below:

*Memos:

• mul() can be used with torch or a tensor.
• The 1st argument(input) with torch(Type:tensor or scalar of int, float, complex or bool) or using a tensor(Type:tensor of int, float, complex or bool)(Required).
• The 2nd argument with torch or the 1st argument with a tensor is other(Required-Type:tensor or scalar of int, float, complex or bool).
• There is out argument with torch(Optional-Default:None-Type:tensor): *Memos:
  • out= must be used.
  • My post explains out argument.
• multiply() is the alias of mul().

import torch

tensor1 = torch.tensor([9, 7, 6])
tensor2 = torch.tensor([[4, -4, 3], [-2, 5, -5]])

torch.mul(input=tensor1, other=tensor2)
tensor1.mul(other=tensor2)
# tensor([[36, -28, 18], [-18, 35, -30]])

torch.mul(input=9, other=tensor2)
# tensor([[36, -36, 27], [-18, 45, -45]])

torch.mul(input=tensor1, other=4)
# tensor([36, 28, 24])

torch.mul(input=9, other=4)
# tensor(36)

tensor1 = torch.tensor([9., 7., 6.])
tensor2 = torch.tensor([[4., -4., 3.], [-2., 5., -5.]])

torch.mul(input=tensor1, other=tensor2)
# tensor([[36., -28., 18.], [-18., 35., -30.]])

torch.mul(input=9., other=tensor2)
# tensor([[36., -36., 27.], [-18., 45., -45.]])

torch.mul(input=tensor1, other=4.)
# tensor([36., 28., 24.])

torch.mul(input=9., other=4.)
# tensor(36.)

tensor1 = torch.tensor([9.+0.j, 7.+0.j, 6.+0.j])
tensor2 = torch.tensor([[4.+0.j, -4.+0.j, 3.+0.j],
                        [-2.+0.j, 5.+0.j, -5.+0.j]])
torch.mul(input=tensor1, other=tensor2)
# tensor([[36.+0.j, -28.+0.j, 18.+0.j],
#         [-18.+0.j, 35.+0.j, -30.+0.j]])

torch.mul(input=9.+0.j, other=tensor2)
# tensor([[36.+0.j, -36.+0.j, 27.+0.j],
#         [-18.+0.j, 45.+0.j, -45.+0.j]])

torch.mul(input=tensor1, other=4.+0.j)
# tensor([36.+0.j, 28.+0.j, 24.+0.j])

torch.mul(input=9.+0.j, other=4.+0.j)
# tensor(36.+0.j)

tensor1 = torch.tensor([True, False, True])
tensor2 = torch.tensor([[False, True, False], [True, False, True]])

torch.mul(input=tensor1, other=tensor2)
# tensor([[False, False, False],
#         [True, False, True]])

torch.mul(input=True, other=tensor2)
# tensor([[False, True, False], [True, False, True]])

torch.mul(input=tensor1, other=False)
# tensor([False, False, False])

torch.mul(input=True, other=False)
# tensor(False)

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