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djm.cc home page
Puzzles
Rec.puzzles-related items
The rec.puzzles archive
(searchable index.)
The rec.puzzles archive[2] (files by name.)
Other locations for the rec.puzzles archive.[3]
Other puzzles from rec.p...
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Common Unicode characters
Ÿ
Other letters, ligatures and diacritical forms: ñ Ñ ç Ç å Å ø Ø æ Æ œ Œ þ Þ ð Ð ß
Quotes: ‘ ’ “ ” « » ‹ › ‚ „ Dashes: – (en) — (em) Inverted signs: ¿ ¡ Other punctuation: … • § ¶ † ‡ © ®
Greek:...
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Perfect, amicable and sociable numbers
Perfect, amicable and sociable numbers
(how to have fun summing up divisors)
Contents
s(n) to be the sum of the
aliquot parts of
n, i.e., the sum of the positive divisors of n, excluding n itself: ...
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Find the constellation which contains given sky coordinates
Finding the constellation which contains given sky coordinates
Enter coordinates below, in the equinox 2000.0 coordinate system. Right ascension should be entered first,
followed by declination. ...
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Other puzzles from rec.puzzles
Calendrical
An emotional issue; the
solution
The four seasons[3]; the sequel,
the five seasons[4]; the
solution to both[5]
Geographical
Addressing the question
of nationality; solution.
Holmes and ...
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David Moews's home page
David Moews's home page
astro2csv and
csv2astro does the reverse.
astroutils is available as a
compressed tar file (13K) and is
distributed under the GPL. The current version of
astroutils is 0....