(differential geometry) A theorem stating that, for an elliptic differential operator on a compact manifold, the analytical index (related to the dimension of the space of solutions) is equal to the topological index (defined in terms of some topological data).

A singular statement that states the existence of its subject.

plural of singular existential statement

A statement that contains only constants and no variables

plural of single life

(insurance) Describing a life insurance policy that insures a single individual's life.

(insurance) The life assured under a single life contract.

In a singable manner; so that it can be sung.

plural of single-serving site

(Internet) A simple website consisting of a single page, with a dedicated domain name, that does only one thing.