This continues the observation from NNPDF/pineko#72 (comment):
There are in fact three values similar to each other in the imported grid:
0.00335233394854679500.00335233394854681260.0033523339485468304
What happens is that (1) is close (less than 64 ULPS) to (2), and (2) is close to (3), but (1) isn't close to (3). Mathematically speaking numerical equality with a tolerance interval isn't transitive. Because of that probably (1) and (2) are removed here
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x1.sort_by(f64::total_cmp); |
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x1.dedup_by(|a, b| approx_eq!(f64, *a, *b, ulps = 64)); |
and (3) is the representative value chosen by Grid::evolve_info, but then Grid::evolve can't find (1) using the same tolerance, because the distance of (1) to (3) is up to two times the tolerance.
This continues the observation from NNPDF/pineko#72 (comment):
There are in fact three values similar to each other in the imported grid:
0.00335233394854679500.00335233394854681260.0033523339485468304What happens is that (1) is close (less than 64 ULPS) to (2), and (2) is close to (3), but (1) isn't close to (3). Mathematically speaking numerical equality with a tolerance interval isn't transitive. Because of that probably (1) and (2) are removed here
pineappl/pineappl/src/grid.rs
Lines 1808 to 1809 in f2152da
and (3) is the representative value chosen by
Grid::evolve_info, but thenGrid::evolvecan't find (1) using the same tolerance, because the distance of (1) to (3) is up to two times the tolerance.