Chebyshev approximation of (1+2๐ฅ)๐๐ฅ๐(๐ฅยฒ)๐๐๐๐๐ฅ in 0โค๐ฅ<โ
Chebyshev approximation of (1+2๐ฅ)๐๐ฅ๐(๐ฅยฒ)๐๐๐๐๐ฅ in 0โค๐ฅ<โ
We have obtained a single Chebyshev expansion of the function <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="f left-parenthesis x right-parenthesis equals left-parenthesis 1 plus 2 x right-parenthesis exp left-parenthesis x squared right-parenthesis erfc x"> <mml:semantics> <mml:mrow> <mml:mi>f</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mi>x</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mo>=</mml:mo> <mml:mo stretchy="false">(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mn>2</mml:mn> <mml:mi>x</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:mi>exp</mml:mi> โฆ