1math(3)                    Erlang Module Definition                    math(3)
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NAME

6       math - Mathematical functions.
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DESCRIPTION

9       This  module  provides  an  interface to a number of mathematical func‐
10       tions.
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12   Note:
13       Not all functions are provided on all  platforms.  In  particular,  the
14       erf/1 and erfc/1 functions are not provided on Windows.
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EXPORTS

18       acos(X) -> float()
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20       acosh(X) -> float()
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22       asin(X) -> float()
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24       asinh(X) -> float()
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26       atan(X) -> float()
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28       atan2(Y, X) -> float()
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30       atanh(X) -> float()
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32       ceil(X) -> float()
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34       cos(X) -> float()
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36       cosh(X) -> float()
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38       exp(X) -> float()
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40       floor(X) -> float()
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42       fmod(X, Y) -> float()
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44       log(X) -> float()
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46       log10(X) -> float()
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48       log2(X) -> float()
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50       pow(X, Y) -> float()
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52       sin(X) -> float()
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54       sinh(X) -> float()
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56       sqrt(X) -> float()
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58       tan(X) -> float()
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60       tanh(X) -> float()
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62              Types:
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64                 Y = X = number()
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66              A collection of mathematical functions that return floats. Argu‐
67              ments are numbers.
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69       erf(X) -> float()
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71              Types:
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73                 X = number()
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75              Returns the error function of X, where:
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77              erf(X) = 2/sqrt(pi)*integral from 0 to X of exp(-t*t) dt.
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79       erfc(X) -> float()
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81              Types:
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83                 X = number()
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85              erfc(X) returns 1.0 - erf(X), computed  by  methods  that  avoid
86              cancellation for large X.
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88       pi() -> float()
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90              A useful number.
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LIMITATIONS

93       As these are the C library, the same limitations apply.
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97Ericsson AB                     stdlib 3.4.5.1                         math(3)