Naperian logarithm - ορισμός. Τι είναι το Naperian logarithm
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Τι (ποιος) είναι Naperian logarithm - ορισμός

MATHEMATICAL FUNCTION
Napier's logarithm; Naperian logarithm; Naperian system of logarithms
  • A plot of the Napierian logarithm for inputs between 0 and 10<sup>8</sup>.
  • The 19 degree pages from Napier's 1614 table of logarithms of trigonometric functions ''[[Mirifici Logarithmorum Canonis Descriptio]]''

Napierian logarithm         
[ne?'p??r??n]
¦ noun another term for natural logarithm.
Origin
C19: named after the Scottish mathematician John Napier (1550-1617).
Napierian logarithm         
The term Napierian logarithm or Naperian logarithm, named after John Napier, is often used to mean the natural logarithm. Napier did not introduce this natural logarithmic function, although it is named after him.
natural logarithm         
  • 1}}, the area taken to be negative.
  • thumb
  • The Taylor polynomials for ln(1&nbsp;+&nbsp;''x'') only provide accurate approximations in the range −1&nbsp;&lt;&nbsp;''x''&nbsp;≤&nbsp;1. Beyond some ''x''&nbsp;&gt;&nbsp;1, the Taylor polynomials of higher degree are increasingly ''worse'' approximations.
LOGARITHM TO THE BASE OF THE MATHEMATICAL CONSTANT E
Natural logarithm integral condition; Integrating the derivative of the logarithm of a function; Natural log; Natural logarithms; ㏑; Base-e logarithm; Ln(x); Ln x; Log natural; Base e; Natural Log; Natural Logarithm; Hyperbolic logarithms; Logarithmus naturalis; Base e logarithm; Logarithm of the base e; Natural logarithm plus 1; Natural logarithm plus 1 function; Lnp1; Ln1p; Ln+1; Logh (mathematics); Logh (function); Log1p; Log1p(x); Lnp1(x); Ln1p(x); LN1+X; LN(1+X); Ln(1+x); Natural system of logarithms; Natural logarithm near one; Natural logarithm plus one; Natural logarithm plus one function; Natural logarithm near 1; Ln(1 + x); Ln(x + 1); Ln(x+1)
¦ noun Mathematics a logarithm to the base e (2.71828 ...).

Βικιπαίδεια

Napierian logarithm

The term Napierian logarithm or Naperian logarithm, named after John Napier, is often used to mean the natural logarithm. Napier did not introduce this natural logarithmic function, although it is named after him. However, if it is taken to mean the "logarithms" as originally produced by Napier, it is a function given by (in terms of the modern natural logarithm):

N a p L o g ( x ) = 10 7 ln ( x / 10 7 ) {\displaystyle \mathrm {NapLog} (x)=-10^{7}\ln(x/10^{7})}

The Napierian logarithm satisfies identities quite similar to the modern logarithm, such as

N a p L o g ( x y ) N a p L o g ( x ) + N a p L o g ( y ) 161180956 {\displaystyle \mathrm {NapLog} (xy)\approx \mathrm {NapLog} (x)+\mathrm {NapLog} (y)-161180956}

or

N a p L o g ( x y / 10 7 ) = N a p L o g ( x ) + N a p L o g ( y ) {\displaystyle \mathrm {NapLog} (xy/10^{7})=\mathrm {NapLog} (x)+\mathrm {NapLog} (y)}

In Napier's 1614 Mirifici Logarithmorum Canonis Descriptio, he provides tables of logarithms of sines for 0 to 90°, where the values given (columns 3 and 5) are

N a p L o g ( θ ) = 10 7 ln ( sin ( θ ) ) {\displaystyle \mathrm {NapLog} (\theta )=-10^{7}\ln(\sin(\theta ))}