-JKP- > 25-04-2019, 09:06 PM
(25-04-2019, 06:58 PM)Morten St. George Wrote: You are not allowed to view links. Register or Login to view....
JP, please note that the plus sign (+) for addition was invented during the middle of the 16th century and hence this marginalia is unlikely to date to the 15th century as you claim.
Morten St. George > 25-04-2019, 10:58 PM
(25-04-2019, 09:06 PM)-JKP- Wrote: You are not allowed to view links. Register or Login to view.The plus sign existed in the 15th century in the senses of "positive quantity", "and", and "add":
• Here is an example from a printed book from the 1480s showing surfeits and deficits from Widmann's Mercantile Arithmetic. The minus sign is longer than the modern version, but the plus sign is the same as the one we use today:
Widmann apparently also taught these symbols to his students (they've been found in one of his students' notebooks).
• The plus sign in the sense of "and" (rather than the traditional ampersand) existed in the 14th century in one of the copies of Oresme's mathematical treatise, Algorismus proportionum, 1360.
• The plus sign in the sense of "add" or "add here" was used in the 15th century to mark sections where the rubricator was supposed to add an embellished initial.
-JKP- > 25-04-2019, 11:09 PM
Quote:Morten: I figured you would find something. You usually do.
Morten St. George > 26-04-2019, 12:39 AM
(25-04-2019, 11:09 PM)-JKP- Wrote: You are not allowed to view links. Register or Login to view.Morten, I've already told you the plus sign was widely used in charms (in the 14th and 15th centuries).
(25-04-2019, 11:09 PM)-JKP- Wrote: You are not allowed to view links. Register or Login to view.You're the one who is inventing the "fact" that it is being used as a mathematical symbol on this folio. The plus sign was used for many different purposes. I've already listed five of them.
Your theory-driven assumption "decided" it was a mathematical operator, but the truth is that it can mean a number of things.
-JKP- > 26-04-2019, 01:39 AM
Morten St. George > 26-04-2019, 04:41 AM
(26-04-2019, 01:39 AM)-JKP- Wrote: You are not allowed to view links. Register or Login to view.To me it looks like te or tc (with old-style curved "t").
In medieval text, it's sometimes hard to tell the difference between e and c (they didn't always close the loop on e) and between t and c (some scribes wrote t and c the same).
-JKP- > 26-04-2019, 05:25 AM
Morten St. George > 26-04-2019, 06:54 PM
(26-04-2019, 05:25 AM)-JKP- Wrote: You are not allowed to view links. Register or Login to view.Tell me again how you are getting those numbers. I tried to find the previous post and must have zoomed past it (twice).
Which ones are you counting as Roman numerals?
By the way, I'm not doubting that there might be numbers. Numbers were common in medieval notations, but I want to know specifically which ones you chose and which ones you omitted.
(26-04-2019, 05:25 AM)-JKP- Wrote: You are not allowed to view links. Register or Login to view.I don't have time to look up how many prophecies there were and I don't know if this is an accurate number, but they are saying 353 quatrains.
davidjackson > 26-04-2019, 07:43 PM
Quote:f(x)+t(x) -> {C:r+G} ........
-JKP- > 26-04-2019, 08:27 PM