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abstraction > hypothesis > theory > law

law
subject			fact

law	has discoverer
	has definition A theory of such wide and invariable application that its violation is thought to be impossible.
	is a kind of theory
theory	has validity correct or incorrect with caveats
	has author or reasearch group
	has domain a field of research
	has date or a range of dates for which the theory was active

Kinds of law :

• conservation law (6 kinds, 22 facts) - Law that identifies a quantity, such as energy, that remains unchanged throughout a transformation. All conservation laws are thought to involve symmetries., A quantity that remains unchanged in the course of the evolution of a dynamical system. There are seven known quantities that are conserved: energy (including mass), momentum, angular momentum (including spin), charge, electron-family number, muon-family number, and baryon-family number.
• electromagnetic law (2 kinds, 6 facts)
• Fechner's law (2 facts) - The intensity of a sensation increases as the logarithm of the stimulus. (See Pogson's ratio.)
• gravity law (6 kinds, 26 facts)
• Lorentz invariance (6 facts) (principle of relativity) - A law which states that laws of physics are identical for all observers moving at constant velocity relative to each other.
• Newton's law of motion (3 kinds, 10 facts) - One of three laws describing the motion of bodies based on the conception of an absolute and immutable space and time; these laws held sway until Einstein's discovery of special relativity.
• optical law (1 kind, 4 facts)
• quantum law (10 kinds, 33 facts)
• thermodynamics law (8 kinds, 20 facts)