code: def project(x):
      """Project onto the hyeprboloid embedded in in n+1 dimensions."""
      return torch.cat(
          [torch.sqrt(1.0 + torch.sum(x * x, 1, keepdim=True)), x], 1
      )
  
file_path: flair/flair/nn/distance/hyperbolic.py
imports: import torch
  from torch import Tensor, nn
label_desc: Use image node_id 4 for calling a global function with example usage: project(x) and returns: torch