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Quantum Field Theory
QFT
... no spooky action at a distance (Einstein)
Early Results
Relativistic Quantum Mechanics Klein-Gordon Equation
Dirac Equation
The Dawn of QFT Spinors
Spin
Feynman Slash Notation
Antimatter
Klein-Gordon Field
Dirac Field
Renormalisation
Grassman Variable
Conformal Field Theory
Countdown to the Standard Model
From a framework to a model Yang-Mills Theory
Quantum Electrodynamics
Quantum Chromodynamics
Electroweak Theory
Higgs Mechanism
Standard Model
Semi-Classical Gravity and the Dark Age Hawking Radiation
Chandrashekhar Limit
Inflation
Problems with the Standard Model
Outlook
Beyond the Standard Model Beyond the Standard Model
Quantum Gravity
Theory of Everything
Related
Related De Donder-Weyl Theory

A Grassmann Variable or Grassmann Number is a "number" which anticommutes with other Grassmann numbers:

\theta_i \theta_j = - \theta_j \theta_i

There are matrices for which this equation is true. But most uses of Grassmann variables in physics do not require an explicit representation; only the algebra is needed.

Grassmann Variables allow the construction of Path Integrals for Fermions. This was worked out by David John Candlin and later by Felix Berezin.

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