anchor.diff:          else failwithf "Cannot exponentiate Tensors with shapes %A, %A" a.Shape b.Shape
       static member Pow (a:Tensor, b) = a ** a.Create(b)
       static member Pow (a, b:Tensor) = b.Create(a) ** b
  +    member t1.Pow(t2:Tensor) = t1 ** t2
  +    member t1.Pow(t2) = t1 ** t1.Create(t2)
   
       static member MatMul (a:Tensor, b:Tensor) =
           if a.Dim <> 2 || b.Dim <> 2 then invalidOp <| sprintf "Expecting two 2d Tensors, received Tensors with shapes %A, %A" a.Shape b.Shape
  
positive.code:         else failwithf "Cannot add Tensors with shapes %A, %A" a.Shape b.Shape
      static member (*) (a:Tensor, b) = a * a.Create(b)
      static member (*) (a, b:Tensor) = b.Create(a) * b
  
      static member (/) (a:Tensor, b:Tensor) =
          if a.Shape = b.Shape then
  
negative.code:         else failwithf "Cannot subtract Tensors with shapes %A, %A" a.Shape b.Shape
      static member (-) (a:Tensor, b) = a - a.Create(b)
      static member (-) (a, b:Tensor) = b.Create(a) - b
      member t1.Sub(t2:Tensor) = t1 - t2
      member t1.Sub(t2) = t1 - t1.Create(t2)
  
      static member (*) (a:Tensor, b:Tensor) =
          if a.Shape = b.Shape then
  