This article [0] proves that the Pāṇinian Shiva Sutras are optimal in some mathematical sense. I'm just learning to get into this, learning Sanskrit grammar, etc. and get a sense of the Asthadyaayi [1] so that I can approach it later in more detail. There are various ways to approach it and some online sites make an attempt, but as per an acquaintance who has been taught under a teacher, it [1] is almost impossible to understand without a teacher. Still, this document [2], seems to give a good understandable overview with pointers for further study.