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*To*: voynich@xxxxxxxxxxxxxx (Voynich Ms. mailing list)*Subject*: VMs: Re: Random discoveries in the library*From*: Jorge Stolfi <stolfi@xxxxxxxxxxxxx>*Date*: Fri, 3 May 2002 08:58:07 -0300 (EST)*In-reply-to*: <20020503094858.63006.qmail@web21407.mail.yahoo.com>*References*: <007601c1f1e7$5be41c20$46004451@kazil> <20020503094858.63006.qmail@web21407.mail.yahoo.com>*Reply-to*: stolfi@xxxxxxxxxxxxx*Sender*: owner-voynich@xxxxxxxxxxxxxx

> I cannot find a single copy of this figure on any > of my old pages. Even the photocopy has gone missing. > I know that Dennis had a copy too, for a while, and > somewhere in the mailing list archive there is a > reference to another web page with the same figure > stating it is actually part of the VMs. (Jim Reeds > found that one). It took some searching, but I found a copy of it in my cache of Voynichanea (which is sort of like my desk, only several orders of magnitude bigger): http://www.ic.unicamp.br/~stolfi/voynich/misc/rene-astro-diag.gif > the [symbol] for Aries (a V with an under- score) looks exactly > like the first red doodle on VMs f1r. Yes. The VMS author must have thought so too. ;-) > Didn't Gauss (well post-VMs) invent a way to predict > the dates of Easter using a method involving > prime numbers, a.o. 17? Hmmm... Well, the usual algorithm is based on a *19* year cycle. It uses other divisors, but mostly to account for leap years and the Gregorian change, and to find the month and day-of-week: http://aa.usno.navy.mil/faq/docs/easter.html c = y / 100 n = y - 19 * ( y / 19 ) k = ( c - 17 ) / 25 i = c - c / 4 - ( c - k ) / 3 + 19 * n + 15 i = i - 30 * ( i / 30 ) i = i - ( i / 28 ) * ( 1 - ( i / 28 ) * ( 29 / ( i + 1 ) ) * ( ( 21 - n ) / 11 ) ) j = y + y / 4 + i + 2 - c + c / 4 j = j - 7 * ( j / 7 ) l = i - j m = 3 + ( l + 40 ) / 44 d = l + 28 - 31 * ( m / 4 ) The algorithm may be due to Gauss, but knowledge of the 19-year cycle is certainly much older. All the best, --stolfi

**References**:**VMs: Random discoveries in the library***From:*Petr Kazil

**VMs: Re: Random discoveries in the library***From:*Rene Zandbergen

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