Showing $\frac{d^3\underline{k}}{2\omega_{k}(2\pi)^3}$ is Lorentz invariant
34228
Lorentz Invariant Integration Measure
121914
Unitary representations of the diffeomorphism group in curved spacetime
139922
Is it known what the necessary and sufficient conditions are for the existence of a "3+1 split" (by means of a foliation) of a (Lorentzian) manifold?
38950
On the uniqueness of the Riemann-Christoffel tensor
87125
Does action really have to be Lorentz-invariant in SR?
137834
Distance in relativistic circular motion in invariant spacetime
146772
Poisson brackets of three dimensional angular momentum and its Lie algebra
106506
How to derive completeness relation in quantum field theory with a Lorentz invariant measure?
84677
An Explicit Isomorphism Between the Three Dimensional Orthogonal Lie Algebra and the Special Linear Lie Algebra of Dimension $3$
12158
Show that $\arctan\frac{1}{2}+\arctan\frac{1}{3}=\frac{\pi}{4}$
124164
($n$-dimensional) Inverse Fourier transform of $\frac{1}{\| \mathbf{\omega} \|^{2\alpha}}$
43304
Lorentz transformation of Gamma matrices $\gamma^{\mu}$
23836
Rigorous proof that $\frac{1}{3} = 0.333\ldots$
58595
Existence of a G-invariant matrix
119477
Understanding the Definition of $\int_\gamma f\ \overline{dz}$
28416
Show that $\partial_\nu T^{\mu\nu} = - j_\nu F^{\mu\nu}$
10109
What quantities are Lorenz-Invariant?