"Pi Day is an annual celebration of the mathematical constant π. Pi Day is observed on March 14 since 3, 1, and 4 are the first three significant digits of π. In 2009, the United States House of Representatives supported the designation of Pi Day." (Wiki)

May the Pi be with you.

;-)

and that was from memory.. :)

You must have a very finely tuned memory to draw from.

I can barely remember what day of the week it is, on a good day.

Now, what does it mean (if anything?)

Amyjo Wrote:
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> Now, what does it mean (if anything?)

It precisely represents the ratio of a circle's circumference to twice its radius. As in C=2πr (or the ratio of the circumference to the diameter of the circle, as in C=πd). And the ratio of the circle's area to its radius, as in A=πr²).

And since pi is an irrational number, you might say that the ratio of a circle's diameter (or area) to its radius is irrational. The bane of all rational-thinking mathematicians...:)

Showoff!!

"It precisely represents the ratio of a circle's circumference to twice its radius. As in C=2πr (or the ratio of the circumference to the diameter of the circle, as in C=πd). And the ratio of the circle's area to its radius, as in A=πr²)."

COMMENT: It is a bit odd to use the word "precisely" as applied to a calculation involving an irrational number. However, what is interesting is that you can indeed get precise, rational, quantitative, results by use of irrational numbers in mathematical equations. For example, the area of a circle is a bounded discrete (not spatially continuous) quantity. Even more interesting is that we are not just talking abstract geometry, but the nature of the real world itself! As science becomes more and more sophisticated, new mathematical concepts are "discovered" that often fly in the face of intuition. First, it was negative numbers, then irrational numbers, then imaginary numbers, all non-intuitive (at least originally) and all playing a significant role in scientific theories that successfully describe the real world in very precise terms. In short, the real world is consistent with a mathematical description that is in some sense fundamentally "irrational." One begins to wonder whether human cognition is the problem, and not either the world itself or the mathematics that describes it. On the other hand, it was human cognition that discovered all of this in the first place.
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"And since pi is an irrational number, you might say that the ratio of a circle's diameter (or area) to its radius is irrational. The bane of all rational-thinking mathematicians...:)"

COMMENT: Well said. Indeed, a paradox lurks somewhere out there! It is refreshing to me that a mathematician like yourself is so tuned-in to mathematical philosophy. So, I guess "philosophy" is not such a dirty word after all. :)

Duly granted. :-)

You earned it.

Looks like one of the Hebrew letters, which also has numerical value.
Those are a lot of numbers to learn by memory. I forget my own phone number sometimes

https://en.m.wikipedia.org/wiki/William_Jones_(mathematician)

It does resemble the chai symbol for life.

At least my chai necklace thinks it so.

:-)

Had Marie calendars chicken pie and peach pie for lunch.

Probably only pie I'll get today.

Yum yum.

:)

Pi/4 = 1/1 - ⅓ + 1/5 - 1/7 + 1/9 - 1/11 + ....

Pi^2/6 = 1/(1^2) + 1/(2^2) + 1/(3^2) + 1/(4^2) + ....

Pi/(2*4) = 1/(1*3) + 1/(5*7) + 1/(9*11) + 1/(13*15) + ...

Pi/2 = (2*2)/(1*3) * (4*4)/(3*5) * (6*6)/(5*7) * (8*8)/(7*9) * ...

From "The Pleasures of Pi,e and Other Interesting Numbers" by Y E O Adrian.

The decimal expansion of Pi is to all appearances and mathematical tests random in its order of digits. There are many (dozens? Hundreds? Thousands? More?) infinite series that calculate some variation of Pi and have an intriguing regularity.

A college calc series through MacLaurin series will give you all the tools you need to crank out a bunch of them. Or you can just look them up like I did. :) It is kind of fun to come up with one on your own.



Edited 1 time(s). Last edit at 03/14/2018 02:44PM by Brother Of Jerry.

I have always been Pi...from the day I was born...

...and I would be extremely bewildered if I was suddenly something else!

There is literally a "pi" buffet in the offices next to mine. I had a piece of banana cream.

I got a really good feeling when I ate it. How else would I know that Pi is true?

I'm a round.

NOpie

M@t

Due to all the calories consumed yesterday, the new "Relaxed Fit" Pi Day is today, 3.15

Pi day is a chance for nerds to show off their nerdness by memorizing pi to a zillion decimal places.
They kicked me out of the group because I know pi only to 5 decimal places.

I've made a pie graph showing how much I like bars

....

And a bar graph showing how much I like pies