For example, in science, the common constants are π, the bottom e of natural logarithm, the coefficient of universal gravitation, the coefficient of expansion of metals and so on.
Constant, a mathematical term, refers to a specified quantity and number, such as the ratio of the circumference to the diameter of a circle π, and the expansion coefficient of iron is 0.0000 12. Constant is a name with a certain meaning, which is used to replace numbers or strings, and its value never changes. In mathematics, the capital letter "c" is usually used to represent a constant. And generally classified as transcendental numbers (such as π, σ 10-j! ), irrational numbers (such as e and φ), uncountable numbers (such as√ 2 and ω u) and computable numbers (such as δ and γ).
Constants have many meanings:
1. The quantity and number specified.
2. A certain repetition rule.
3. A certain number or usual number.
4. A certain order.
5. Mathematical terminology. A fixed value. For example, the ratio of circumference to diameter (π) of a circle is about 3. 14 159, and the expansion coefficient of iron is 0.0000 12. Constant is a name with a certain meaning, which is used to replace numbers or strings, and its value never changes. Mathematical constants refer to constants with constant values, as opposed to variables. Unlike most physical constants, the definition of mathematical constants has nothing to do with all physical measurements. Mathematical constants are usually elements of real or complex fields.
Mathematical constants can be called definable numbers (usually computable). Other alternative representations can be found in mathematical constants (arrangements expressed by continued fractions). A constant, also called a definite number, refers to a constant with a constant value, as opposed to a variable. (Constant refers to a number greater than zero)
6. Physical terminology. In physics, many measured values are called constants. For example, the coefficient of universal gravitation and the acceleration of surface gravity. However, some studies show that some of these constants are not constants, so they are called "indefinite constants" and "non-constant constants".