Original Issue: #3512

math.sign(0) // gives 0 ✅
math.sign(math.complex(0,0)) // gives 0+0i ✅
math.sign(math.fraction(0)) // gives 1/1 ❌, it should give 0/1 

Fixed:

issue where math.sign(math.fraction(0)) incorrectly returned 1/1 instead of 0/1. Changed fraction sign detection from checking x.s to checking x.n === 0n (numerator is

Modified:

/function/arithmetic/sign.js:55 - Changed from return new Fraction(x.s) to return x.n === 0n ? new Fraction(0) : new Fraction(x.s)

Added:

test/unit-tests/function/arithmetic/sign.test.js:108-110 - Added test case for math.sign(math.fraction(0))

npm run lint and npm test had no issues :)