(3) As a block-coordinate descent method, we can iteratively alternate between the two optimisation blocks and every limit point of Algorithm 1 is a globally optimal point (cmp.
later in the first half of the 20th century, different textual statistics, such as Zipf's distribution (Zipf, 1932) and Yule's k-statistic (Yule, 1944) have been proposed to quantify textual style.