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Restr:Recorde - The Whetstone of Witte - equals.jpg

Recorde_-_The_Whetstone_of_Witte_-_equals.jpg ‎(490 × 194 piksel, ment ar restr : 75 Kio, seurt MIME : image/jpeg)

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Diverradur

Deskrivadur
English: Robert Recorde's explanation of the first usage of the mathematical equals sign from which the current "=" symbol origins.
Čeština: Vysvětlení Roberta Recorde prvního použití matematického symbolu rovnosti, ze kterého vychází dnešní znak "=".
Deiziad
Mammenn http://blog.plover.com/math/recorde.html - The image is an excerpt from the Recorde's book The Whetstone of Witte.
Aozer Robert Recorde

The text in the scanned image transcription

Howbeit, for easie alteratiõ of equations. I will propounde a fewe exãples, bicause the extraction of their rootes, maie the more aptly bee wroughte. And to auoide the tediouse repetition of these woordes : is equalle to : I will sette as I doe often in woorke vse, a paire of paralleles, or Gemowe lines of one lengthe, thus: =====, bicause noe .2. thynges, can be moare equalle. And now marke these nombers.

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Recorde_-_The_Whetstone_of_Witte_-_equals.jpg

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