Talk:First-order partial differential equation
 | This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
| |||||||||||
Why the wave equation here?
[edit]Why is the discussion about the wave equation here? Is the wave equation not of second order? — Preceding unsigned comment added by Vitelot (talk • contribs) 06:59, 22 July 2018 (UTC)