Happy e day!
Today is February 7, 2018. If you write this the American way, with the month first, and leave out the 20, this gives 2/7/18. And 2, 7, 1 and 8 are the first four digits of one of the most important numbers in mathematics,
This is why today we celebrate
To help get the party started, here are some of our favourite Plus articles about
Maths in a minute: Compound interest and e — Compound interest is the curse of debt and the blessing of saving. Find out how it works and what it has to do with
Maths in a minute: Euler's identity —Here's a quick introduction to the beauty queen amongst mathematical formulas, which involves
The making of the logarithm —The natural logarithm is intimately related to the number
Have we caught your interest? —This is a longer and more detailed article about compound interest and
Polar power —Like spirals and flowers? Then you'll love polar coordinates and the pretty pictures they allow you to draw. One of those is intimately related to
Radioactive decay and exponential laws —Arguably, the exponential function crops up more than any other when using mathematics to describe the physical world. This article looks at radioactive decay and exponential laws.
Light attenuation and exponential laws —This is another article that explores the appearance of exponential laws in nature. It explores light attenuation: the way in which light decreases in intensity as it passes through a medium. the a
Comments
Evan Romer
I always celebrate e Day on February 71st (April 12 or April 11, depending on the year).
Michael Greaney
Using the British form, 2/7/18 = 2nd July 2018.
Do we crack open the champagne again five months' time?
Marianne
Why not?!
len
Infinity is a property of a circle (that is, it's number of sides). Wrt e^ipi+1=0, this formula
could mean that the infinity we imagine, in said script, is not yet filled. And, being there
are only ratios involved space is elastic so the entrance is at the end of the hall where
the last room is always empty and no one ever need leave their room for the next guest.
stan
stan lee
Infinity is a property of a circle (that is, it's number of sides). Wrt e^ipi+1=0, this formula
could mean that the infinity we imagine, in said script, is not yet filled. And, being there
are only ratios (no unit measures) involved space is elastic so the entrance is at the end of the hall where the last room is always empty. No one ever need leave their room.
len/stan