Bill Browder, Kremlin Critic, Briefly Arrested In Spain For Murky Reasons

Bill Browder, a former Moscow financier turned anti-Kremlin activist, prepares to speak with European officials about the Magnitsky Act last week in The Hague.

Browder says he was arrested on a Russian warrant via Interpol. Spanish police say they released him because the warrant was "invalid." And Interpol denies having issued a formal warrant at all.

(Image credit: Robin Van Lonkhuijsen/AFP/Getty Images)

News : NPR https://ift.tt/2srzrb7 May 30, 2018 at 08:14PM

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Solving Van der Pol equation with ivp_solve

Van der Pol’s differential equation is The equation describes a system with nonlinear damping, the degree of damping given by μ. If μ = 0 the system is linear and undamped, but for positive μ the system is nonlinear and damped. We will plot the phase portrait for the solution to Van der Pol’s equation in Python using SciPy’s new ODE solver ivp_solve . The function ivp_solve does not solve second-order systems of equations directly. It solves systems of first-order equations, but a second-order differential equation can be recast as a pair of first-order equations by introducing the first derivative as a new variable. Since y is the derivative of x , the phase portrait is just the plot of ( x , y ). If μ = 0, we have a simple harmonic oscillator and the phase portrait is simply a circle. For larger values of μ the solutions enter limiting cycles, but the cycles are more complicated than just circles. Here’s the Python code that made the plot. from scipy import linspace from ...

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Opening statements were made in the "Socialite Grifter" trial on Wednesday, and both sides provided extremely different reasons why Anna Sorokin allegedly scammed a number of people and institutions out of $275,000. [ more › ] Gothamist https://ift.tt/2HXgI0E March 29, 2019 at 12:33AM

Photos: Miss Subways Crowned After Drinking A 'Vial Of Cuomo's Tears'

After a particularly dramatic primary that focused a lot on NYC's (crumbling) mass transit , it was fitting that the new Miss Subways invoked Governor Cuomo—and his challenger after winning the title last night. [ more › ] Gothamist https://ift.tt/2R2bqmJ September 28, 2018 at 10:13PM

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