Ellipse.

The ellipsea historical and mathematical journey / by: (Electronic resources)

Oblique derivative problems for elliptic equations in conical domains by: (Electronic resources)

Interface problems for elliptic second-order equations in non-smooth domains by: (Electronic resources)

Ellipse.

Conic sections.

Derivatives (Mathematics)

Mathematics

Differential Equations.

Differential equations, Elliptic.

Parabola.

Mathematics.

Functional Analysis.

Coordinates, Oblique.