Proofs

Famous arguments, taken apart line by line.

• Euclid's TheoremThe proof that the prime numbers never run out, and the flawed retelling of it that circulates widely.
• Euler's IdentityWhy $e^{i\pi}+1=0$ holds, worked from the power series definition of the exponential function.
• Self-Solving Card TrickA simple card trick that uses algebra to look like magic
• The Gaussian IntegralEvaluating the definite integral of a non-integratable function