/Sidereus-s_notes.github.io/A minimal, responsive and feature-rich Jekyll theme for technical writing. 2026-05-03T07:34:22+00:00 Sidereus /Sidereus-s_notes.github.io/ Jekyll © 2026 Sidereus /Sidereus-s_notes.github.io/assets/img/favicons/favicon.ico /Sidereus-s_notes.github.io/assets/img/favicons/favicon-96x96.png 2026-05-03T05:58:12+00:00 2026-05-03T05:58:12+00:00 /Sidereus-s_notes.github.io/posts/welcome-to-jekyll/ Sidereus

You’ll find this post in your _posts directory. Go ahead and edit it and re-build the site to see your changes. You can rebuild the site in many different ways, but the most common way is to run jekyll serve, which launches a web server and auto-regenerates your site when a file is updated. Jekyll requires blog post files to be named according to the following format: YEAR-MONTH-DAY-title.MAR...

2026-05-03T00:00:00+00:00 2026-05-03T00:00:00+00:00 /Sidereus-s_notes.github.io/posts/Differential-Equations/ Sidereus

1. Basic Definitions Differential equation (DE): An equation that relates an unknown function with one or more of its derivatives. Ordinary differential equation (ODE): Contains derivatives with respect to a single independent variable. Partial differential equation (PDE): Contains partial derivatives with respect to multiple independent variables. Order: The highest derivative appear...