physics, mathematical physics, philosophy of physics
theory (physics), model (physics)
experiment, measurement, computable physics
Axiomatizations
Tools
Structural phenomena
Types of quantum field thories
In philosophy, the universe is a realm within which (some conceived part, naively and virtually all, of) reality takes place.
In physics, a universe is a realm within which physics may be thought of as taking place. Such universes include:
all of spacetime and its contents,
the observable universe, the part of the universe that is physically observable by humans
In mathematics, a universe is a realm within which mathematics may be thought of as taking place. Such universes include:
In set theory, a universe of sets such as a von Neumann universe or a Grothendieck universe;
In type theory, a type universe.
Last revised on July 2, 2025 at 18:29:39. See the history of this page for a list of all contributions to it.