## It’s all about the ink…

Called “the most remarkable formula in mathematics” by Richard Feynman, **Leonhard Euler**‘s Identity, as the equation in the tattoo is known, was named in a reader poll conducted by *Mathematical Intelligencer* as the most beautiful theorem in mathematics. Another reader poll conducted by *Physics World* named it the “greatest equation ever.” *****

One can find other mathematical and scientific tattoos **here**… and if one wishes to design one’s own, well…

… just click **here**.

**As we steel ourselves for the needle**, we might recall that on this date in 1947, George C. Marshall, a former general serving as Secretary of State, gave the speech at Harvard that laid the foundation for what became known as The Marshall Plan– the program under which the U.S. provided around $12 Billion (a fraction of the sum that the Federal government is “investing” in G.M, but real money in those days… ) to help finance the economic recovery of Europe in the wake of World War II.

Oh, and lest we forget, June is **Accordion Appreciation Month**.

*****Why is Euler’s Identity considered beautiful? Three basic arithmetic operations occur exactly once each: addition, multiplication, and exponentiation. The identity also links five fundamental mathematical constants:

-The number 0.

-The number 1.

-The number π, which is ubiquitous in trigonometry, geometry of Euclidean space, and mathematical analysis (π ≈ 3.14159).

-The number e, the base of natural logarithms, which also occurs widely in mathematical analysis (e ≈ 2.71828).

-The number i, imaginary unit of the complex numbers, which contain the roots of all nonconstant polynomials and lead to deeper insight into many operators, such as integration.

And the equation is “balanced,” with zero on one side.