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Multiplies a scalar times a Tensor or IndexedSlices object.

This is a special case of tf.math.multiply, where the first value must be a scalar. Unlike the general form of tf.math.multiply, this is operation is guaranteed to be efficient for tf.IndexedSlices.

x = tf.reshape(tf.range(30, dtype=tf.float32), [10, 3])
with tf.GradientTape() as g:
  y = tf.gather(x, [1, 2])  # IndexedSlices
  z = tf.math.scalar_mul(10.0, y)

scalar A 0-D scalar Tensor. Must have known shape.
x A Tensor or IndexedSlices to be scaled.
name A name for the operation (optional).

scalar * x of the same type (Tensor or IndexedSlices) as x.

ValueError if scalar is not a 0-D scalar.