an effective theory is a deliberately limited scientific theory applicable under specific circumstances. In practice, all theories are effective theories...

physics, an effective field theory is a type of approximation, or effective theory, for an underlying physical theory, such as a quantum field theory or a statistical...

In quantum chromodynamics, heavy quark effective theory (HQET) is an effective field theory describing the physics of heavy (that is, of mass far greater...

mathematics and logic, effective is used to describe metalogical methods that fit the criteria of an effective procedure. In group theory, a group element acts...

In quantum field theory, soft-collinear effective theory (or SCET) is a theoretical framework for doing calculations that involve interacting particles...

Chiral perturbation theory (ChPT) is an effective field theory constructed with a Lagrangian consistent with the (approximate) chiral symmetry of quantum...

In materials science, effective medium approximations (EMA) or effective medium theory (EMT) pertain to analytical or theoretical modeling that describes...

of achieving stated goals. Theory of Change is focused not just on generating knowledge about whether a program is effective, but also on explaining what...

In metalogic, mathematical logic, and computability theory, an effective method or effective procedure is a finite-time, deterministic procedure for solving...

is motivated by the low energy effective theory of the chiral spin states which is a topological quantum field theory (TQFT). New quantum numbers, such...

Other effective theories are heavy quark effective theory (which expands around heavy quark mass near infinity), and soft-collinear effective theory (which...

Effective descriptive set theory is the branch of descriptive set theory dealing with sets of reals having lightface definitions; that is, definitions...

to topological field theory. In condensed matter physics, topological quantum field theories are the low-energy effective theories of topologically ordered...

quantum field theory, the Nambu–Jona-Lasinio model (or more precisely: the Nambu and Jona-Lasinio model) is a complicated effective theory of nucleons and...

application to the solution of Diophantine equations, results in number theory have been scrutinised more than in other branches of mathematics to see...

based on NJL model results). For each phase, they then write down an effective theory for the low-energy excitations, in terms of a small number of parameters...

In physics and probability theory, Mean-field theory (MFT) or Self-consistent field theory studies the behavior of high-dimensional random (stochastic)...

In quantum field theory, the quantum effective action is a modified expression for the classical action taking into account quantum corrections while...

models, heavy quark effective theory, dimensional deconstruction, little Higgs, and unparticle theories. Unparticle physics is a theory that there exists...

Effective accelerationism (e/acc) is a 21st-century philosophical movement that advocates for an explicitly pro-technology stance. Its proponents believe...

computability theory overlaps with proof theory and effective descriptive set theory. Basic questions addressed by computability theory include: What...

sophisticated models available are based on chiral effective field theory. This effective field theory (EFT) includes all interactions compatible with the...

(1995). "Introduction to the Effective Field Theory Description of Gravity". In Cornet, Fernando (ed.). Effective Theories: Proceedings of the Advanced...

Effective altruism (EA) is a 21st-century philosophical and social movement that advocates impartially calculating benefits and prioritizing causes to...

concurred with the latter theory, suggesting that "demand creates its own supply" and developing a comprehensive theory of effective demand. According to Keynesian...

philosophy of science sense. Effective theory Phenomenological model Phenomenological quantum gravity "Phenomenological Theory", Condensed Matter Physics...

Renormalization and Effective Field Theory provides a rigorous formulation of perturbative renormalization that combines both the effective-field theory approaches...

effective theory (HQET), a mathematical formalism that has allowed physicists to make predictions about otherwise intractable problems in the theory of...

Renormalization is a collection of techniques in quantum field theory, statistical field theory, and the theory of self-similar geometric structures, that are used...

definition) in graphene. As it simplifies the more general band theory, the electronic effective mass can be seen as an important basic parameter that influences...