code: def d_minus(
      tau: types.FloatTensor,
      z: types.FloatTensor,
      r: types.FloatTensor,
      q: types.FloatTensor,
      sigma: types.FloatTensor,
  ) -> types.FloatTensor:
      return d_plus(tau, z, r, q, sigma) - sigma * tf.math.sqrt(tau)
  
file_path: tf-quant-finance/tf_quant_finance/experimental/american_option_pricing/common.py
imports: import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import dtype_util
  from tf_quant_finance import types
label_desc: Use image node_id 3 for calling a global function with example usage: d_minus(tau, z, r, q, sigma) and returns: unknown