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BigComplexMath#sqrt fails when x is a negative real number #71

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Onedy opened this issue Apr 22, 2024 · 0 comments

Onedy commented Apr 22, 2024

big-math/ch.obermuhlner.math.big/src/main/java/ch/obermuhlner/math/big/BigComplexMath.java

Line 282 in b659e2f

public static BigComplex sqrt(BigComplex x, MathContext mathContext) {

This fails when x is a negative real number because you are dividing (x+abs(x))/abs(x+abs(x)) which is 0/0.

Maybe these are helpful: https://mathworld.wolfram.com/SquareRoot.html and org.apache.commons.numbers.complex.Complex#sqrt() from org.apache.commons:commons-numbers-complex.

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