Calculation of Definite Integral.

Keyword Physics Formulas,Definite Integral,Euler's number,Napier's number.

Reference [1]：Graham Woan著･堤正義訳：『ケンブリッジ物理公式ハンドブック』,共立出版,pp.44,2007.

Remarks ・LaTeX： \int_{0}^{\infty }e^{-ax^{2}}dx= \frac{1}{2}\left ( \frac{\pi }{a}\right) ^{\frac{1}{2}} ・Making above Equation Image is powered by CODECOGS

History ・2010/02/13：Upload.