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comment about conceptual failure case

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Quaternions 2023-12-02 03:05:53 -08:00
parent 5da5006027
commit aec82358ee
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src/zeroes.rs
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@ -9,6 +9,7 @@ pub fn zeroes2(a0:Planar64,a1:Planar64,a2:Planar64) -> Vec<Planar64>{
let radicand=a1.get() as i128*a1.get() as i128-a2.get() as i128*a0.get() as i128*4; let radicand=a1.get() as i128*a1.get() as i128-a2.get() as i128*a0.get() as i128*4;
if 0<radicand { if 0<radicand {
//start with f64 sqrt //start with f64 sqrt
//failure case: 2^63 < sqrt(2^127)
let planar_radicand=Planar64::raw(unsafe{(radicand as f64).sqrt().to_int_unchecked()}); let planar_radicand=Planar64::raw(unsafe{(radicand as f64).sqrt().to_int_unchecked()});
//TODO: one or two newtons //TODO: one or two newtons
//sort roots ascending and avoid taking the difference of large numbers //sort roots ascending and avoid taking the difference of large numbers