--| home | research | txt | code | teach | specialfunctionswiki | timescalewiki | hyperspacewiki | links |--
$\displaystyle\lim_{R \rightarrow \infty} R \displaystyle\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}} e^{it} \log\left( 1 + \dfrac{1}{Re^{it}} \right) \mathrm{d}t = \pi$
The Houston Problem Book (wiki)
Reduction of the Black-Scholes equation to the Heat Equation
Solutions to "Special Functions" by Rainville
"Lemma vs. Theorem"
"How does a branch cut define a branch?"
Infinitesimal time scale calculus
2010 1 December - Construction of a regular 17-gon

Zero divisor graphs
Zero-divisor graphs of localizations and modular rings
The nilradical and non-nilradical graphs of commutative rings
Zero-divisor ideals and realizable zero-divisor graphs

Differential analyzer
Differential analyzer TiKz schematic: [pdf] [tex]
Five problems on a $2$-integrator differential analyzer and the sign of direction
The train running problem