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Fix implementation of complex expm1. Add tests that fail with previous implementation, but pass with the current one.

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Srinivas Vasudevan
2019-12-12 01:56:54 +00:00
committed by Rasmus Munk Larsen
parent 381f8f3139
commit 88062b7fed
2 changed files with 23 additions and 1 deletions
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5
test/array_cwise.cpp
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@@ -429,6 +429,11 @@ template<typename ArrayType> void array_complex(const ArrayType& m)
VERIFY_IS_APPROX(m1.exp(), exp(m1));
VERIFY_IS_APPROX(m1.exp() / m2.exp(),(m1-m2).exp());
VERIFY_IS_APPROX(m1.expm1(), expm1(m1));
VERIFY_IS_APPROX(expm1(m1), exp(m1) - 1.);
// Check for larger magnitude complex numbers that expm1 matches exp - 1.
VERIFY_IS_APPROX(expm1(10. * m1), exp(10. * m1) - 1.);
VERIFY_IS_APPROX(sinh(m1), 0.5*(exp(m1)-exp(-m1)));
VERIFY_IS_APPROX(cosh(m1), 0.5*(exp(m1)+exp(-m1)));
VERIFY_IS_APPROX(tanh(m1), (0.5*(exp(m1)-exp(-m1)))/(0.5*(exp(m1)+exp(-m1))));