Comments (3)
paulmasson
commented on June 13, 2024
No: result is always complex because of the intermediate logarithms of negative numbers. For real input the imaginary part is zero and should be discarded.
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axkr
commented on June 13, 2024
See this case for negative numbers
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paulmasson
commented on June 13, 2024
My bad: cosIntegral and coshIntegral are both complex for negative real arguments. Fixed in cd9d18e. Let me know if you find other problematic cases, otherwise closing again.
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