Quantum thrust and Rotckets

 $$T=v\frac{dm}{dt}$$

$$E=\hbar\omega, \ E=mc^2$$

$$T=\frac{\hbar}{c}\dot{\omega}$$

Uncountable-product representation of the Riemann Zeta function

 $$\zeta(s)\sim\prod_{t\in\mathbb{R}}\left(1+(\frac{\frac{1}{2}-s}{t})^2\right)$$

Auxiliary-function representation of functions

 $$f(x)=\sum_k a_k A^k(x)$$

Taylor series: $$A(x)=x$$

Fourier series: $$A(x)=e^{ix}$$