E is the natural logarithm constant logarithm, denoted lnN (N> 0). It has important significance in physics, biology and other natural sciences, general representation for the lnx. Mathematics is also common to logx natural logarithm.
1, by a constant number of e is the natural logarithm base number is called, denoted lnN (N> 0)
2, e is an infinitely non-repeating decimals, which value is approximately equal 2.718281828459 ..., beyond which is a number. E, as a mathematical constant, in base of the natural logarithmic function. Sometimes called the number (Euler number) Euler, Swiss mathematician Euler named; also has a relatively uncommon name Napier constant, to commemorate the Scottish mathematician John Napier (John Napier) the introduction of number. It is like pi π and the imaginary unit i, e is one of the most important mathematical constants
3, ln i.e. natural logarithm ln a = loge a. E to the logarithm in base commonly used in LN
. 4, when the natural logarithm lnN N is the continuous self-variables known as a logarithmic function, denoted by y = lnx (x> 0) (x is the independent variable, y is the dependent variable)
For example: lne = 1