 The Wronskian

Chapter 15 in 18.03 Supplementary Notes by Haynes Miller. Authorship inherits the explicitly verified collection credit to Haynes Miller; it is not inferred from course instructor credits. No separate chapter publication date is verified.

Online text: ocw.mit.edu/courses/18-03-differential-equations-spring-2010/b06d6e91e362964ec92c9027dbbc28a9_MIT18_03S10_chapter_15.pdf

Cited passages: printed pp. 72–73, common homogeneous equation (1), initial-data system (3), determinant (4) and zero-or-nowhere-zero theorem. The final PDF page identifies the Spring 2010 course.