690 reputation
616
bio website
location United Kingdom
age
visits member for 3 years, 1 month
seen Jul 26 at 16:16

Manual worker. Live in England. Formal scientific education "peaked" many years ago when I failed maths and chemistry A-level and scraped a bare pass in physics. Still enjoy pottering about in maths and physics.


Jun
5
accepted Minkowski metric and definition of coordinate differentials?
Dec
19
accepted Riemann curvature tensor symmetries confusion
Sep
9
accepted Index raising and lowering - how does it work?
Jul
13
accepted Derivation of freely falling frame in Schwarzschild spacetime
Jun
5
accepted Einstein-de Sitter - confusing constant of integration
May
29
accepted Kronecker delta confusion
Jan
22
accepted Is this interpretation of $\psi=\frac{1}{\sqrt{\pi a^{3}}}e^{-r/a}$ correct?
Jan
15
accepted Calculation of spherical Bessel functions - meaning of $\left(\frac{1}{x}\frac{d}{dx}\right)^{l}$
Dec
31
accepted Don't understand the integral over the square of the Dirac delta function
May
7
accepted Zero divergence of energy-momentum tensor and gravitational energy
Apr
26
accepted Confusion regarding geodesic of thrown ball - curved or Cartesian coordinates?
Apr
8
accepted Hubble time, the age of the Universe and expansion rate
Apr
7
accepted How does the critical density decide the fate of the Universe?
Apr
3
accepted Very basic question about empty universe
Mar
31
accepted Why doesn't dark energy vary with time?
Mar
9
accepted Finding the correct units for the energy-momentum tensor?
Mar
5
accepted Still trying to understand gravitational potential and Poisson's equation?
Feb
23
accepted Why no basis vector in Newtonian gravitational vector field?
Feb
22
accepted Trying to understand Laplace's equation
Dec
21
accepted Proper distance and embedding diagrams?