Mathematical constant
From Wikipedia, a free encyclopedia written in simple English for easy reading.
A mathematical constant is a number, which has a special meaning for calculations. For example, the constant π (spoken as "pi") means the ratio of the length of a circle's circumference to its diameter. This value is always the same for any circle. In contrast to physical constants, mathematical constants do not come from physical measurements.
[edit] Some mathematical constants
- Here are some important mathematical constants
| Name | Symbol | Value | Meaning | 
|---|---|---|---|
| Pi, Archimedes' constant or Ludoph's number | π | ≈ 3.141592653589793 | ratio of the length of a circle's circumference to its diameter, area of the unit circle | 
| E, Napier's constant | e | ≈ 2.718281828459045 | base of natural logarithm | 
| Golden mean | φ |  | It is the ratio of a larger value to a smaller value if this is equal to the ratio of the sum of the values to the larger value. | 

