Commit a231c33e authored by Paul Eggert's avatar Paul Eggert

Update "Calendrical Calculations" cites

* lisp/calendar/calendar.el: Update citations to the book
"Calendrical Calculations" and its predecessors.
parent 1527235b
......@@ -76,20 +76,19 @@
;; solar.el Sunrise/sunset, equinoxes/solstices
;; Technical details of all the calendrical calculations can be found in
;; ``Calendrical Calculations: The Millennium Edition'' by Edward M. Reingold
;; and Nachum Dershowitz, Cambridge University Press (2001).
;; "Calendrical Calculations: The Ultimate Edition" by Edward M. Reingold
;; and Nachum Dershowitz, Cambridge University Press (2018).
;; An earlier version of the technical details appeared in
;; ``Calendrical Calculations'' by Nachum Dershowitz and Edward M. Reingold,
;; An earlier version of the technical details appeared in "Calendrical
;; Calculations" by Nachum Dershowitz and Edward M. Reingold,
;; Software--Practice and Experience, Volume 20, Number 9 (September, 1990),
;; pages 899-928, and in ``Calendrical Calculations, Part II: Three Historical
;; Calendars'' by E. M. Reingold, N. Dershowitz, and S. M. Clamen,
;; Software--Practice and Experience, Volume 23, Number 4 (April, 1993),
;; pages 383-404.
;; Hard copies of these two papers can be obtained by sending email to
;; reingold@cs.uiuc.edu with the SUBJECT "send-paper-cal" (no quotes) and
;; the message BODY containing your mailing address (snail).
;; pages 899-928 <https://doi.org/10.1002/spe.4380200905>
;; <https://pdfs.semanticscholar.org/83b1/14f570002a7a8e1d4e3730cd0e4cdbcad212.pdf>,
;; and in "Calendrical Calculations, Part II: Three Historical Calendars" by
;; E. M. Reingold, N. Dershowitz, and S. M. Clamen, Software--Practice and
;; Experience, Volume 23, Number 4 (April, 1993), pages 383-404
;; <https://doi.org/10.1002/spe.4380230404>
;; <http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.42.6421&rep=rep1&type=pdf>
;; A note on free variables:
......@@ -1916,10 +1915,12 @@ use instead of point."
The absolute date is the number of days elapsed since the (imaginary)
Gregorian date Sunday, December 31, 1 BC. This function does not
handle dates in years BC."
;; See the footnote on page 384 of ``Calendrical Calculations, Part II:
;; Three Historical Calendars'' by E. M. Reingold, N. Dershowitz, and S. M.
;; Clamen, Software--Practice and Experience, Volume 23, Number 4
;; (April, 1993), pages 383-404 for an explanation.
;; For an explanation, see the footnote on page 384 of "Calendrical
;; Calculations, Part II: Three Historical Calendars" by
;; E. M. Reingold, N. Dershowitz, and S. M. Clamen,
;; Software--Practice and Experience, Volume 23, Number 4 (April,
;; 1993), pages 383-404 <https://doi.org/10.1002/spe.4380230404>
;; <http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.42.6421&rep=rep1&type=pdf>.
(let* ((d0 (1- date))
(n400 (/ d0 146097))
(d1 (% d0 146097))
......
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