The strong-reflection asymptote is read from per-group sums of I*corr, its
square and the counting variance at the group mean - a walk over every full's
record on the host. In the GPU build a kernel takes them, one thread per group
in index order with the host's rounding (CountingVarianceExact); the host keeps
the strong-group selection and the median.
p.mtz md5, p.cif and the error-model lines (which print the asymptote)
unchanged on myob, cytc, 8a1a and 8qaw (GPU build).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SVmAWnzCmRKAXVUCdc4iNi
leonarski_fandClaude Opus 5.5
e59d227294