code: def vander(x, N=None, increasing=False):
      # if N == 0:
      #     return ivy.array([], dtype=x.dtype)
      # else:
      return ivy.vander(x, N=N, increasing=increasing, out=None)
  
imports: import ivy
  from ivy.func_wrapper import with_unsupported_dtypes, with_supported_dtypes
  from ivy.functional.frontends.torch.func_wrapper import to_ivy_arrays_and_back
  from ivy.functional.frontends.torch import promote_types_of_torch_inputs
  import ivy.functional.frontends.torch
label_desc: Use image node_id 42 for calling a global function with example usage: vander(x, N, increasing) and returns: ivy