A description of an event or system that is considered to be accurate
A coherentstatement or set of ideas that explains observed facts or phenomena and correctly predicts new facts or phenomena not previously observed, or which sets out the laws and principles of something known or observed; a hypothesis confirmed by observation, experiment etc.
A set of axioms together with all statements derivable from them; ''or'', a set of statements which are . ''Equivalently,'a formal language plus a set of axioms . The statements may be required to all be bound (''i.e.'', to have no free variables
Esimerkit
Knot theory classifies the mappings of a circle into 3-space.