Developer Guide for Intel® Data Analytics Acceleration Library 2018 Update 3
The sum of functions F(θ) is a function that has the form of a sum:
For given set of the indices I = {i 1, i 2, ... , i m }, 1 ≤ i k < n, k ∈ {1, ..., m}, the value and the gradient of the sum of functions in the argument θ has the format:
The set of the indices I is called a batch of indices.