set theory
— Noun
– English
～ the branch of pure mathematics that deals with the nature and relations of sets
scientific theory
— Noun
– English
～ a theory that explains scientific observations; "scientific theories must be falsifiable"
steady state theory
— Noun
– English
～ (cosmology) the theory that the universe maintains a constant average density with matter created to fill the void left by galaxies that are receding from each other; "the steady state theory has been abandoned in favor of the big bang theory"
special relativity theory
— Noun
– English
～ a physical theory of relativity based on the assumption that the speed of light in a vacuum is a constant and the assumption that the laws of physics are invariant in all inertial systems
special theory of relativity
— Noun
– English
～ a physical theory of relativity based on the assumption that the speed of light in a vacuum is a constant and the assumption that the laws of physics are invariant in all inertial systems
string theory
— Noun
– English
～ (particle physics) a theory that postulates that subatomic particles are one-dimensional strings