Building the department map…
Building the department map…
Department paths
Courses with no prerequisites inside the department that unlock the most downstream work.
The shortest canonical route from each entry point to a gateway course.
Each of these unlocks the largest share of downstream work on this map. Courses from other departments can appear here when they genuinely gate PY.420 coursework.
Generated from Johns Hopkins University’s catalog, prerequisite, and concentration data. Spotted an error? Departments can adjust labels, ordering, and notes without a code change, so contact us.
Intro tiers at the top, advanced work below; arrows point from a prerequisite to the course it unlocks. Courses from other departments appear where they gate PY.420 work. Click any course to see what it requires and unlocks without leaving this page; hovering lights up its neighbors. The lists on this page carry the same courses in text form.
Showing the 4 PY.420 and feeder courses that have prerequisite links. 16 more PY.420 courses have no recorded prerequisites. They are listed under Tracks below, not drawn as loose dots here.
Upper-level clusters, grouped by the gateway that opens them.
The deepest prerequisite chains in PY.420. These are the routes that take the most semesters to climb.
4 courses deep, ending at PY.420.724
All PY.420 courses in the Johns Hopkins catalog
Grade medians are for verified students. Sign in with your school email to see them.
Use your school emailNo section schedule with instructor names for PY.420 yet.
No clubs or organizations on record under PY.420 yet.
This shows once five students share their club memberships.
PY.420 does not run a page here yet. When it does, its events show up here and on the Johns Hopkins campus feed.