1) Introduction to a treatise 2) Isagogics 
academic introduction to a subject
• (n.) An introduction.
(from the article `logic, history of`) In the 4th century Marius Victorinus produced Latin translations of Aristotle`s Categories and De interpretatione and of Porphyry of Tyre`s Isagoge ... ...since the sources at his disposal were the same ones that had been available in Europe for the preceding 600 years: Aristotle`s Categories and D...
I'sa·goge noun [ Latin , from Fr. ..., from ... to introduce; ... into + ... to lead.] An introduction. [ Obsolete] Harris. 
isagoge, isagogic 1. Introductory to any branch of study. 2. Introductory studies; especially, that department of theology that is introductory to exegesis, and is concerned with the literary and external history of the books of the Bible.
an introduction, esp. a scholarly introduction to a field of study or research. · isagogics.