Revision history

• 2022-06-11 (updated references to other articles in this series to link to html abstract pages instead of to pdfs. Didn't change the version number/date)
• 2022-06-04 (added new section, chose a different letter for one operator)
• 2022-05-24 (trimmed abstract, added a synonym in a footnote, fixed two typos, added an equation cross-reference, adjusted wording in two sentences)
• 2022-05-23 (first version)