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"2 lines you should never cross….horizontal and vertical"

"Invisible soles, leave .308 holes"

I wonder what it’s like to have a man inside your lines

My guess is that its similar to the feeling you get when you are about to shoot a deer or other animal. Massive adrenaline dump.  

Invisible souls, leave .308 holes. 

The brachistochrone

This animation is about one of the most significant problems in the history of mathematics: the brachistochrone challenge.

If a ball is to roll down a ramp which connects two points, what must be the shape of the ramp’s curve be, such that the descent time is a minimum?

Intuition says that it should be a straight line. That would minimize the distance, but the minimum time happens when the ramp curve is the one shown: a cycloid.

Johann Bernoulli posed the problem to the mathematicians of Europe in 1696, and ultimately, several found the solution. However, a new branch of mathematics, calculus of variations, had to be invented to deal with such problems. Today, calculus of variations is vital in quantum mechanics and other fields.

(Source: saulofortz)

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