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-rw-r--r--Doc/library/math.rst3
1 files changed, 0 insertions, 3 deletions
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 0083409..3c41672 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -40,9 +40,6 @@ Number-theoretic and representation functions
*y*. On platforms that support signed zeros, ``copysign(1.0, -0.0)``
returns *-1.0*.
- If *x* is NaN, *y* is ignored and NaN is returned. If *y* is NaN,
- it is treated as positive: ``copysign(-1.0, NaN)`` returns 1.0.
-
.. function:: fabs(x)
Return the absolute value of *x*.