We have moved to https://dokuwiki.librecad.org/

Lots of content was already moved to the new wiki, but there is still work to do. If you want to contribute, please register a new account at https://dokuwiki.librecad.org/

This wiki will be kept for a while to keep search engine results valid. Moved sites may be deleted here in future.

Difference between revisions of "Math bits"

From LibreCAD wiki
Jump to: navigation, search
(→‎modular function in LibreCAD)
(→‎modular function in LibreCAD)
Line 3: Line 3:
  
 
remainder(x - 0.5*a,a)+0.5*a
 
remainder(x - 0.5*a,a)+0.5*a
−
 
−
 
−
<math>
 
−
  \operatorname{erfc}(x) =
 
−
  \frac{2}{\sqrt{\pi}} \int_x^{\infty} e^{-t^2}\,dt =
 
−
  \frac{e^{-x^2}}{x\sqrt{\pi}}\sum_{n=0}^\infty (-1)^n \frac{(2n)!}{n!(2x)^{2n}}
 
−
</math>
 

Revision as of 16:28, 22 April 2012

modular function in LibreCAD

the standard glibc fmod(x, a) is not convenient here, since we need a modular function work the same way for both positive and negative numbers, instead, we use,

remainder(x - 0.5*a,a)+0.5*a

Retrieved from "https://wiki.librecad.org/index.php?title=Math_bits&oldid=584"