Four-vectors

Four-gradient

In differential geometry, the four-gradient (or 4-gradient) is the four-vector analogue of the gradient from vector calculus. In special relativity and in quantum mechanics, the four-gradient is used to define the properties and relations between the various physical four-vectors and tensors. (Wikipedia).

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Dear all I am making maths videos and also a maths tutor for all levels. Offer online+ Face to Face. Check out my website for more information www.abdallahmathstutoring.co.uk Also i sell products on etsy.com/AWMathsStationary for calculators and books. Books are all 50 pence for all lev

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Kronecker delta | Dot product | Charge conservation | Divergence theorem | Divergence | Flux | Partial derivative | Vector potential | Complex number | Differential geometry | Minimal coupling | Wavelength | Total derivative | Raising and lowering indices | Wavenumber | Conservation law | Action (physics) | Noether's theorem | Four-acceleration | Natural units | Vector notation | Dimension | Gauge covariant derivative | Dimensional analysis | Angular momentum | Green's function | Relativistic angular momentum | Christoffel symbols | Four-frequency | Four-force | Four-momentum | Lorentz covariance | Ricci calculus | Einstein notation | Index notation | Electromagnetic four-potential | Matrix (mathematics) | Speed of light | Four-vector | Hamiltonian mechanics | Stokes' theorem | Surface (mathematics) | Continuity equation | D'Alembert operator | Dirac spinor | Abstract index notation | Wave equation | Metric tensor (general relativity) | Scalar potential | Klein–Gordon equation | Metric signature | Covariance and contravariance of vectors | Energy density | Euclidean vector | Jacobi identity | Vector calculus | Vector field | Covariant derivative | Schrödinger equation | Vector-valued function | Four-current | Gradient | Antisymmetric tensor | Hamilton–Jacobi equation | Dirac equation | Four-velocity | Vector operator | Minkowski space | Gamma matrices | Lorentz scalar | Limiting case (mathematics) | Electromagnetic tensor | Tensor | Lagrangian mechanics | Metric tensor | Wave | Curvature | Conservation of energy | Stress–energy tensor | Volume integral