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Diffstat (limited to 'Doc/library/cmath.rst')
| -rw-r--r-- | Doc/library/cmath.rst | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/Doc/library/cmath.rst b/Doc/library/cmath.rst index e113ffc3e5..c819a667ec 100644 --- a/Doc/library/cmath.rst +++ b/Doc/library/cmath.rst @@ -253,6 +253,40 @@ Constants The mathematical constant *e*, as a float. +.. data:: tau + + The mathematical constant *τ*, as a float. + + .. versionadded:: 3.6 + +.. data:: inf + + Floating-point positive infinity. Equivalent to ``float('inf')``. + + .. versionadded:: 3.6 + +.. data:: infj + + Complex number with zero real part and positive infinity imaginary + part. Equivalent to ``complex(0.0, float('inf'))``. + + .. versionadded:: 3.6 + +.. data:: nan + + A floating-point "not a number" (NaN) value. Equivalent to + ``float('nan')``. + + .. versionadded:: 3.6 + +.. data:: nanj + + Complex number with zero real part and NaN imaginary part. Equivalent to + ``complex(0.0, float('nan'))``. + + .. versionadded:: 3.6 + + .. index:: module: math Note that the selection of functions is similar, but not identical, to that in @@ -276,5 +310,3 @@ cuts for numerical purposes, a good reference should be the following: Kahan, W: Branch cuts for complex elementary functions; or, Much ado about nothing's sign bit. In Iserles, A., and Powell, M. (eds.), The state of the art in numerical analysis. Clarendon Press (1987) pp165--211. - - |