<p>I am reading a paper on <a href="http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.322.213&amp;rep=rep1&amp;type=pdf" rel="nofollow">multiple change-point model</a> and do not understand one of the equation. </p>

<p>Is it considered on-topic to ask questions about a paper like that? On the one hand, it's clearly statistics. On the other hand, the question may be so specific that it may not contribute towards "building a knowledge site". Plus, I'm not sure about the community's reception towards question about specific paper (vs. question about general statistical concept.)</p>
