| erf |
Error function |
\(erf(x)=\frac{1}{\sqrt\pi}\int_{-x}^x e^{-t^2}\) |
| erfc |
Complementary error function |
\(erfc(x)= 1-erf(x)=\frac{2}{\sqrt{\pi}}\int_x^{\infty}e^{-t^2}\) |
| cos |
Cosine (angle in radians) |
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| sec |
Secant (angle in radians) |
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| csc |
Cosecant (angle in radians) |
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| tan |
Tangent (angle in radians) |
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| cot |
Cotangent (angle in radians) |
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| asin |
Inverse sine (in radians) |
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| acos |
Inverse cosine (in radians) |
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| atan |
Inverse tangent (in radians) |
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| atan2 |
Two-argument inverse tangent (in radians) |
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| delta |
delta(x)=1 if x=0, 0 otherwise |
\( \delta(x)=\begin{cases} 0 & x< 0 \newline 1 & x=0 \newline 0 & x> 0 \end{cases} \) |
| step |
step(x)=0 if x<0, 1 if x>=0 |
\(\theta(x)=\begin{cases} 0 & x< 0 \newline 1 & x\ge 0 \end{cases}\) |
| select |
select(x,y,z)=z if x=0, y otherwise |
\(select(x,y,z)= \begin{cases} z & x= 0 \newline y & x \ne 0 \end{cases}\) |
