## The Math Behind the Rolling Shutter Effect.

Here's a pair of blog posts explaining the math behind the "Rolling Shutter Effect": Playing Detective with Rolling Shutter Photos and Rolling Shutters.
posted by empath on Oct 13, 2014 - 13 comments

## The Quest for Randomness

Can you ever be reasonably sure that something is random, in the same sense you can be reasonably sure something is not random (for example, because it consists of endless nines)? Even if a sequence looked random, how could you ever rule out the possibility that it had a hidden deterministic pattern? And what exactly do we mean by “random,” anyway?
posted by empath on Apr 24, 2014 - 48 comments

## "An infinite number of mathematicians walk into a bar..."

1 + 2 + 3 + 4 + 5 ... = -1/12 -- Numberphile explains a counter-intuitive summation of an infinite series.
posted by empath on Jan 9, 2014 - 136 comments

## Visualizing Numbers with WebGl

How To Fold a Julia Fractal. A beautiful interactive introduction to complex numbers, fractals and waves. (Requires WebGL). To Infinity And Beyond is a similar introduction to calculus.
posted by empath on Jul 11, 2013 - 33 comments

## Assume A Cylindrical Cow

The Mathematics of the Manhattan Project
posted by empath on Jul 10, 2013 - 40 comments

## Echoes Reality

Max Cooper makes beautiful and twitchy minimal techno with mathematical videos.
posted by empath on Aug 25, 2011 - 19 comments

## The Earth Is Flat (to a certain approximation)

Old Theories As Limits of New Ones -- Theoretical physicist, Lubos Motl, takes a brief tour through the history of physics, and explains the simple mathematical relationship of old theories to the theories that replace them.
posted by empath on Aug 5, 2011 - 16 comments

## What is reality?

Horizon asks "What is reality?" -- youtube for links for those outside the UK: 1, 2, 3, 4. It's a hard question. To help you answer it, Stanford has a set of free courses available on line by Leonard Susskind: General Relativity, Cosmology, New Revolutions in Particle Physics, Quantum Entanglement, Special Relativity, Classical Mechanics, Statistical Mechanics, The Standard Model. (Each link is to lecture 1 of a full college course of a dozen or so lectures.) If you need help with the math, the Khan Academy should help get you up to speed.
posted by empath on Jan 23, 2011 - 67 comments

## Music is Math

Music is Math (lots of different variations on the page. Watch this one in full screen and with headphones.)
posted by empath on Sep 9, 2010 - 9 comments

## Math is beautiful

It's been called the most beautiful theorem in all of mathematics.
posted by empath on Mar 9, 2010 - 48 comments

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