Columbia subject headings:
Differential equations, Partial.
Embeddings (Mathematics)
Exterior differential systems.
Riemannian manifolds.
Harvard subject headings:
Differential equations, Partial.
Embeddings (Mathematics)
Exterior differential systems.
Riemannian manifolds.
Princeton subject headings:
Differential equations, Partial.
Embeddings (Mathematics)
Exterior differential systems.
Riemannian manifolds.