[cctbxbb] Question about sigma(I) calculation in merge_equivalents

[Luc Bourhis]

Dear Keitaro,

> I would like to know the theory of this sigma calculation in CCTBX.

That theory is written up in a file you can find in the source distribution of the CCTBX, cctbx/miller/equivalent_reflection_merging.tex. For your convenience I have also attached the resulting PDF.

Best wishes,

Luc J. Bourhis

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