690 reputation
616
bio website
location United Kingdom
age
visits member for 3 years, 1 month
seen 9 hours ago

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
asked Minkowski metric and definition of coordinate differentials?
Dec
18
asked Riemann curvature tensor symmetries confusion
Sep
9
asked Index raising and lowering - how does it work?
Aug
5
answered Understanding Tensors
Jul
12
asked Derivation of freely falling frame in Schwarzschild spacetime
Jun
3
asked Einstein-de Sitter - confusing constant of integration
May
29
asked Kronecker delta confusion
Jan
21
asked Is this interpretation of $\psi=\frac{1}{\sqrt{\pi a^{3}}}e^{-r/a}$ correct?
Jan
15
asked Calculation of spherical Bessel functions - meaning of $\left(\frac{1}{x}\frac{d}{dx}\right)^{l}$
Dec
30
asked Don't understand the integral over the square of the Dirac delta function
May
5
asked Zero divergence of energy-momentum tensor and gravitational energy
Apr
25
asked Confusion regarding geodesic of thrown ball - curved or Cartesian coordinates?
Apr
24
asked Why do objects follow geodesics in spacetime?
Apr
7
asked Hubble time, the age of the Universe and expansion rate
Apr
5
asked How does the critical density decide the fate of the Universe?
Apr
1
asked Very basic question about empty universe
Mar
30
asked Why doesn't dark energy vary with time?
Mar
9
asked Finding the correct units for the energy-momentum tensor?
Mar
5
asked Still trying to understand gravitational potential and Poisson's equation?
Feb
23
asked Why no basis vector in Newtonian gravitational vector field?