February 7 – “e” day

Standard

Image
source: http://gogeometry.com/software/word_cloud_sw_e_euler_number.html

Today is e day! Mathematics would be a key element in my own personal hell, but I’ll look into this a little bit. It certainly beats “Wave all five fingers at your neighbour day” which makes me laugh considerably as organisers have clearly felt the need to specify the type of finger waving.

“e” is a mathematical number which can be rounded to 2.71828, hence why the number is celebrated on this date (for us Australians it’s actually the 7/2 today, but I’m of the understanding that in other countries they write the date: month/day/year, and so it is 2/7, like the number 2.7.).

The mathematical e, also known as Euler’s number, is an irrational number (like pi.). If I’m going to be completely honest, I don’t really understand it, as (according to the ever reliable Wikipedia) is involved in scary things like this:
Image

But for those who have the background to understand,  “It is the limit of (1 + 1/n)n as n approaches infinity (source: the almighty wikipedia). It is this:
\large{e=1+\frac{1}{1!}+\frac{1}{2!}+\frac{1}{3!}+...}
(http://www.intmath.com/blog/today-is-e-day/4133)

For us mere simpletons the real life applications of this number include thermodynamics, electrodynamics, growth and decay (e.g. radioactivity) and continuous compound interest.

~ Darcierae

Info-links:
Real world examples
http://mathforum.org/library/drmath/view/72946.html

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s