It looks like a complex conjugate operator torch.conj() was added a couple of months ago on master, but isn’t available in v1.3.1:

  
      github.com/pytorch/pytorch
  
  
    
  
    
  

  
    
      Vectorized complex unary and binary op support. 29
    

    
      pytorch:master ← dylanbespalko:unary_binary_ops
    

    
      
        opened 
        
          
        
        Sep 19, 2019
      
      

      
        
          
          dylanbespalko
        
      

      
        
          +1462
          -82