Concepts
The building blocks of EulerVertex's content model — read these before creating new content, so what you build fits the way the graph is meant to work.
Nodes
The core knowledge unit — a definition, theorem, and so on.
Facets
A perspective on a node — a proof, example, intuition, or interactive component.
Edges
How nodes connect into a graph — def_dependency, prep_hint, and context_variant edges.
Problems
Standalone, typed, auto-gradable practice items.
Pages
A composed sequence of nodes, facets, problems, and components with your own narrative.
Courses
An ordered sequence of pages, plus the curricula that declare what they cover.