Complex matrix inversion with issues

Discussion around the Swiss Micros DM42 calculator.
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Joined: Sat Jan 23, 2021 6:32 pm
Location: Belgium

Re: Complex matrix inversion with issues

Post by jneven »

Thanks Thomas. I was already very satified with this 68. But your are right ... it's their software ... I suppose they know what they are doing. :D
Thomas Okken
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Joined: Tue May 02, 2017 5:48 pm
Location: United States → Netherlands

Re: Complex matrix inversion with issues

Post by Thomas Okken »

I explained my reasoning for using 68 to Mr. Cornea; he repeated it should be 69 but didn't explain why. Oh well. I made the change and it will be in the next official release (Free42 3.0.1 has my work-around which avoids bid128_hypot() altogether). The patch using 68 isn't bad, of course, if Marius Cornea is right about 69 then my version can potentially lose 1 digit of precision, which is still a lot better than the original which can lose 33. (Or is it 32? Or 34? Aaaah 😰)
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