We built this site for people who already know where Jv(x) belongs in their model but want a trustworthy number (and a quick plot on the real line) before opening a heavier CAS session.
The interface follows a mission-control layout: compact panels, high-contrast typography, and calculator-first navigation so you can move from question to answer in one screen on mobile.
- Real and complex argument modes with clearly separated inputs.
- Tables formatted for copy-friendly review in lab notes.
- Optional Jv(t) plot when x is real.
- Fully static hosting compatible with Cloudflare Pages.