plural of group scheme

(category theory, scheme theory) A group object that is an object in a category of schemes; a scheme that has certain properties that generalise the concept of group.

Used other than figuratively or idiomatically: see scheme, theory. / (algebraic geometry) The branch of mathematics that concerns schemes (algebraic varieties equipped with the Zariski topology).

plural of pilot scheme

An experiment carried out to test a new idea or concept before full-scale introduction; a pilot study.

An arch less than a semicircle.

plural of scheme arch

Synonym of Horner's method

An illicit money-making investment scheme whereby early investors are paid primarily or wholly by later investors. Eventually all such schemes fail to the detriment of recent (later) investors.

A fraudulent scheme where earlier investors are paid with the money taken from new investors, giving the impression that the scheme is a viable investment.