(mathematics) A principle that gives a condition for finding the eigenvalues for a real symmetric matrix.

A principle in international law where international boundaries are extended over sea areas in the Arctic towards the North Pole following meridians (lines of longitude). The same principle is used over land in the Antarctic to the South Pole.

Synonym of Heisenberg uncertainty principle

Synonym of principle of least astonishment

A rule for assigning epistemic probabilities, according to which, in the absence of any relevant evidence, agents should distribute their credence (or 'degrees of belief') equally among all the possible outcomes.

Synonym of principle of indifference

A hypothesis attempting to explain how evolution may lead to "honest" or reliable signalling between animals which have an obvious motivation to bluff or deceive each other. It suggests that costly signals must be reliable, costing the signaller something that could not be afforded by an individual with less of a particular trait.

The idea that decisions about how to spend research funds should be made by researchers rather than politicians.

(law) legal principle under which the state should only limit an individual's actions to the extent that they would cause harm to another

The principle that the parties in a transaction should be independent and on an equal footing, without any favorable treatment, fiduciary duties, etc.