Triple

Target class: spinor formalism
Context triple: [Infeld–van der Waerden formalism, instanceOf, spinor formalism]

• A. pseudo-Riemannian manifold
  A pseudo-Riemannian manifold is a smooth manifold equipped with a nondegenerate, symmetric metric tensor of arbitrary signature that allows measurement of lengths and angles, including those with indefinite sign as in spacetime geometry.
• B. spacetime
  Spacetime is the four-dimensional continuum that unifies the three dimensions of space with time into a single geometric framework in which all physical events occur.
• C. Lorentzian manifold
  A Lorentzian manifold is a smooth manifold equipped with a metric tensor of signature \((-+\cdots+)\) (or its variants) that models spacetime in general relativity by distinguishing timelike, spacelike, and null directions.
• D. polarization formalism
  Polarization formalism is a theoretical framework that mathematically represents and analyzes the polarization state of waves (such as light) and their transformations through optical systems.
• E. representation of the Lorentz group chosen
  A representation of the Lorentz group is a mathematical structure (typically a vector space with linear operators) on which the Lorentz transformations act in a way that preserves the group operations, allowing physical fields or states to transform consistently under changes of inertial reference frames.
• F. None of above.