270 reputation
19
bio website scholarpedia.org/article/…
location Arizona
age 47
visits member for 2 years, 2 months
seen Nov 18 at 19:36

Author of the Wikipedia pages Kepler's Equation, and Radial Trajectory. Assistant editor at Scholarpedia. Google+ profile.


Oct
23
answered What is the inverse of $f(x)=\frac{e^x+e^{-x}}{e^x-e^{-x}}$?
Sep
22
comment How to write $a^{ix}$ in terms of $\sin(x)$ and $\cos(x)$?
$e^{\ln(a)}$ is single valued for $a \ne 0$.
Sep
20
comment How to write $a^{ix}$ in terms of $\sin(x)$ and $\cos(x)$?
$a=e^{\ln a}$ is true for negative values of a: $(a=e^{\ln a}, a\neq 0)$.
May
2
answered what will be the answer of this limit.
Apr
2
awarded  Informed
Dec
2
revised Can this gravitational field differential equation be solved, or does it not show what I intended?
corrected error in markup
Dec
2
suggested suggested edit on Can this gravitational field differential equation be solved, or does it not show what I intended?
Sep
8
awarded  Yearling
Sep
2
answered What is the pattern to this sequence?
Jul
22
awarded  Citizen Patrol
Jul
18
reviewed No Action Needed Statistics formula for wifi positioning.
May
26
reviewed Reviewed Poisson point process convergence
May
26
suggested suggested edit on Poisson point process convergence
May
12
reviewed No Action Needed Solve $2^{2x} + 9e^{-2x} = 6$ for x using substitution.
May
11
awarded  Custodian
May
11
reviewed No Action Needed When is an intersection of varieties finite
May
6
comment Can this gravitational field differential equation be solved, or does it not show what I intended?
The correct differential equation is: $ - \frac{G M m}{r^2} = \mu \ddot r $ where $ \mu = \frac{M m}{M+m} $ is the reduced mass.
May
1
comment Can this gravitational field differential equation be solved, or does it not show what I intended?
The correct equation is: $$ - \frac{G M m}{r^2} = \frac{M}{M+m} m \ddot r $$
Apr
30
answered Can this gravitational field differential equation be solved, or does it not show what I intended?
Mar
30
answered Are constant numbers (rank-0 tensors that are fixed) considered as symmetric tensors?