diff options
Diffstat (limited to 'numpy/lib/scimath.py')
| -rw-r--r-- | numpy/lib/scimath.py | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/numpy/lib/scimath.py b/numpy/lib/scimath.py index ed04d1ce5..0d765fa20 100644 --- a/numpy/lib/scimath.py +++ b/numpy/lib/scimath.py @@ -198,15 +198,15 @@ def sqrt(x): As the numpy.sqrt, this returns the principal square root of x, which is what most people mean when they use square root; the principal square root - of x is not any number z such as z^2 = x. + of x is not any number z such as z^2 = x. For positive numbers, the principal square root is defined as the positive - number z such as z^2 = x. + number z such as z^2 = x. The principal square root of -1 is i, the principal square root of any negative number -x is defined a i * sqrt(x). For any non zero complex number, it is defined by using the following branch cut: x = r e^(i t) with - r > 0 and -pi < t <= pi. The principal square root is then + r > 0 and -pi < t <= pi. The principal square root is then sqrt(r) e^(i t/2). """ x = _fix_real_lt_zero(x) |