Optimal. Leaf size=26 \[ x \text{Erfi}(b x)-\frac{e^{b^2 x^2}}{\sqrt{\pi } b} \]
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Rubi [A] time = 0.0047307, antiderivative size = 26, normalized size of antiderivative = 1., number of steps used = 1, number of rules used = 1, integrand size = 4, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.25, Rules used = {6351} \[ x \text{Erfi}(b x)-\frac{e^{b^2 x^2}}{\sqrt{\pi } b} \]
Antiderivative was successfully verified.
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Rule 6351
Rubi steps
\begin{align*} \int \text{erfi}(b x) \, dx &=-\frac{e^{b^2 x^2}}{b \sqrt{\pi }}+x \text{erfi}(b x)\\ \end{align*}
Mathematica [A] time = 0.0072138, size = 26, normalized size = 1. \[ x \text{Erfi}(b x)-\frac{e^{b^2 x^2}}{\sqrt{\pi } b} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.04, size = 26, normalized size = 1. \begin{align*}{\frac{1}{b} \left ( bx{\it erfi} \left ( bx \right ) -{\frac{{{\rm e}^{{b}^{2}{x}^{2}}}}{\sqrt{\pi }}} \right ) } \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.01803, size = 34, normalized size = 1.31 \begin{align*} \frac{b x \operatorname{erfi}\left (b x\right ) - \frac{e^{\left (b^{2} x^{2}\right )}}{\sqrt{\pi }}}{b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 2.26128, size = 68, normalized size = 2.62 \begin{align*} \frac{\pi b x \operatorname{erfi}\left (b x\right ) - \sqrt{\pi } e^{\left (b^{2} x^{2}\right )}}{\pi b} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A] time = 0.148698, size = 22, normalized size = 0.85 \begin{align*} \begin{cases} x \operatorname{erfi}{\left (b x \right )} - \frac{e^{b^{2} x^{2}}}{\sqrt{\pi } b} & \text{for}\: b \neq 0 \\0 & \text{otherwise} \end{cases} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \operatorname{erfi}\left (b x\right )\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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