HACKER NEWS / REDDIT
圆周率集锦
讨论目录
1,591–1,620 / 13,083 条 · 第 54 / 437 页
-
-
So, it's said that basically everything may be contained in Pi. Does that not apply to all irrational numbers?
1 条相关评论
- 证明与性质 · 2016-03-15 · 33 分
-
TIL It only takes the first 39 digits of pi to calculate the circumference of the observable universe
-
ELI5: If the number pi is just the ratio of a circle's diameter to it's radius why can't an exact ratio of these two numbers be found?
-
TIL that the 6 nines at the 762nd decimal point of PI are named the Feynaman Point
1 条相关评论
- 历史与文化 · 2011-11-09 · 12 分
-
TIL π = 4/1 - 4/3 + 4/5 - 4/7 + 4/9 - 4/11 + 4/13 - 4/15 ... continued to infinity.
1 条相关评论
- 计算与算法 · 2012-01-12 · 2 分
-
ELI5: Why are irrational numbers [pi / e / phi] important?
-
If the smallest division of space is a Planck length, why does Pi continue to infinite decimal places and thus divisions of space? If there can be no perfect circle, is there a circle most similar to the ideal, which wo…
-
TIL How Pi Was Calculated
-
ELI5: How do we know numbers like "e" & "pi" are transcendental? If its true, how do people calculate all those digits of them, down to the millions of digits?
-
why do we learn the formula of the circumference as 2 * pi * R instead of pi *diameter?
-
Happy Pi Day everyone!
-
Unresolved secrets of the pyramids (2014) - scientists, architects, archeologists, and engineers find pi, the golden number, the speed of light, the circumference of earth and sun and more in the dimensions of the great…
1 条相关评论
- 定义与几何 · 2016-12-27 · 1 分
-
Can the nth decimal digit of a defined irrational number, such as pi, be calculated without having to calculate the n-1 preceding digits?
-
Can a circle be re-imagined as a polygon with a number of sides equal to pi?
-
Eli5: Why does pi have an infinite number of decimals?
15 条相关评论
- 计算与算法 · 2022-04-16 · 3 分
- 证明与性质 · 2022-04-16 · 2 分
- 证明与性质 · 2022-04-16 · 2 分
- 证明与性质 · 2022-04-16 · 2 分
- 证明与性质 · 2022-04-16 · 1 分
- 证明与性质 · 2022-04-16 · 2 分
- 证明与性质 · 2022-04-16 · 1 分
- 证明与性质 · 2022-04-16 · 1 分
- 证明与性质 · 2022-04-16 · 3 分
- 证明与性质 · 2022-04-16 · 3 分
- 证明与性质 · 2022-04-18 · 2 分
- 证明与性质 · 2022-04-16 · 2 分
- 计算与算法 · 2022-04-16 · 1 分
- 定义与几何 · 2022-04-16 · 0 分
- 证明与性质 · 2022-04-16 · 3 分
-
Pi is calculated using a perfect circle, but it's never perfect, because it's rounded up, so if you actually use pi (which is rounded to a finite number) to draw a circle, you can't get a perfect circle.
-
ELI5: If mathematical pi is the ratio between a circles circumference and diameter how is it possible to calculate it to a great number of decimal places? How do we either measurement with a high enough level of accurac…
-
what would a circle look like if pi was equals to 4 or another constant?
-
TIL: The name for the maths constant 'Pi' is derived from the first letter of the Greek word 'perimetros' which means circumference.
1 条相关评论
- 定义与几何 · 2016-06-03 · 1 分
-
TIL it has never been proven that the decimal expansion of pi contains every possible finite sequence of digits, although mathematicians believe it is probably the case, and it the subject of some mystic memes which ass…
-
[WP] You are a computer scientist computing pi when after a billion billion digits they stop being random and form a long string of 1's and 0's
-
Which came first π or the radian..?
-
Pi is derived from a line drawn through the centre of a circle. What other mathematical patterns can be derived through the drawing of other geometric shapes within a circle?
-
Locating yourself as a digit in π?
-
On a stop watch between 3.14 seconds and 3.15 seconds you will pass exactly pi seconds
1 条相关评论
- 证明与性质 · 2019-08-31 · 11 分
-
ELI5: What is the purpose of radian? Why do mathematicians feel the need to divide a semicircle into π equal arcs?
-
How do we find (-1)^pi? More generally, how do we find an irrational power of a negative number?
1 条相关评论
- 证明与性质 · 2015-11-05 · 17 分
-
ELI5: Why is the number Pi used to find the area and circumference of a circle?
-
Pi is definitely wrong. -Turn a square 360 degrees, and you get the correct ratio:
201 条相关评论