code: def gelu(x):
      """Original Implementation of the gelu activation function in Google Bert repo when initially created.
      For information: OpenAI GPT's gelu is slightly different (and gives slightly different results):
      0.5 * x * (1 + torch.tanh(math.sqrt(2 / math.pi) * (x + 0.044715 * torch.pow(x, 3))))
      Also see https://arxiv.org/abs/1606.08415
      """
      return x * 0.5 * (1.0 + torch.erf(x / math.sqrt(2.0)))
  
imports: import math
  import torch
  import torch.nn
  import torch.nn.functional
  from .Attention import MultiHeadAttention
label_desc: Use image node_id 1 for calling a global function with example usage: gelu(x) and returns: unknown