User:Crasshopper

I started editing Wikipedia in 2005 and average 100 edits/year.

I'm an American living in Indiana.

I started or revived the following pages:
 * Countersignaling
 * Econophysics
 * Dynamic stochastic economics
 * Option pricing
 * Non-wellfounded mereology

Other pages I started:
 * John Challifour
 * Max Zorn - not really but I contributed an interesting tidbit about his guitar-playing and once when he got hit by a bus.

Bookmarks
Unusual articles

The rest
My favorite number is $$ \sqrt{2} $$.

Curriculum Vitæ

Equations
$$\max \sum_{t=1}^\infty \delta^t \cdot u(w_t)$$

$$L = \sum_{t=0}^\infty  \sum_{z^t}  \beta^t \cdot U(c_t(z^t) \cdot \pi_t (z^t))    +    \sum_{t=0}^\infty   \sum_{z^t} \lambda_t z^t \cdot \{ z^t \cdot f(k_t (z^{t-1} ))   +   (1 - \delta) \cdot k_t (z^{t-1}) - c_t (z^t)  +  k_{t+1} (z^t) \}  $$

$$\$ = \mathrm{wage} \cdot (1 - \mathrm{leisure\ time} ) $$

⋉ Rubik's Cube is $$\mathbb{Z}^7_3 \times \mathbb{Z}^{11}_2 \rtimes ((A_8 \times A_{12}) \rtimes \mathbb{Z}_2)$$

<img src="http://latex.codecogs.com/gif.latex?\large \dpi{120} \bg_white \Huge{\text{ Determinant }} \ \Normal{\det |\mathcal{M}|} \\ \\ |\mathcal{M}| \Large{\text{ is }} \left| \; \begin{pmatrix} &a \leadsto a &&& a \leadsto b& \\ \\ &b \leadsto a &&& b \leadsto b& \end{pmatrix} \; \right|" title="\large \dpi{120} \bg_white \Huge{\text{ Determinant }} \ \Normal{\det |\mathcal{M}|} \\ \\ |\mathcal{M}| \Large{\text{ is }} \left| \; \begin{pmatrix} &a \leadsto a &&& a \leadsto b& \\ \\ &b \leadsto a &&& b \leadsto b& \end{pmatrix} \; \right|" />

$$ \begin{matrix} 100 \, ^{\circ} \rm{F}  &   \longrightarrow   &   311 \, \rm{K}   \\ \\ && \downarrow \\ \\ -180 \, ^{\circ} \rm{F}         &     \longleftarrow          &    155   \, ^1\!\!/\!_2  \, \rm{K} \end{matrix} $$

$$ \| \text{song} \| = \int \text{compression wave} $$

$$ \gamma \ \overset{\mathrm{def}}= \ {1 \over \ \sqrt[2]{ \; 1 \; - \; ( \, {v \over c} \, ) \, ^2 } \ } $$

$$ \gamma \ \overset{\mathrm{def}}= \ {1 \over \ \sqrt[2]{ 1 \; - \; ( \, \textrm{\%\ of\ speed\ of\ light} \, )\, ^2 } \ } $$

$$ {\color{red}x'} \gets \gamma \cdot {\color{red} x} \; + \; \imath \; \gamma \; \cdot \; {v \over c} \; \cdot \; t \qquad = \ \frac{{\color{red} x} \; + \; ^1\!\!/\!_4 \circlearrowleft \; \cdot \; \mathbf{\%} \; \cdot \; t}{ \mathrm{NORM\ 1} } $$

$$ t' \gets \gamma \cdot t \; - \; \imath \; \gamma \; \cdot \; {v \over c} \; \cdot \; {\color{red} x} \qquad = \ \frac{t \; + \; ^1\!\!/\!_4 \circlearrowright \; \cdot \; \mathbf{\%} \; \cdot \; t}{ \mathrm{NORM\ 1} } $$