tf.keras.backend.foldl

Reduce elems using fn to combine them from left to right.

fn Callable that will be called upon each element in elems and an accumulator, for instance lambda acc, x: acc + x
elems tensor
initializer The first value used (elems[0] in case of None)
name A string name for the foldl node in the graph

Tensor with same type and shape as initializer.