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Alfonso

The 1901 Jewish Encyclopedia

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Encyclopedias
1911 Encyclopedia Britannica
• Alfonso Ferrero La Marmora
• Alfonso Maria Dei Liguori
• Giovanni Alfonso Borelli
•   (only first 3 shown)
McClintock and Strong's Bible Encyclopedia
• Aguazzari, Alfonso
• Alarcon, Alfonso de
• Alfonso, de Espina, or Spina
•   (only first 3 shown)
The Nuttall Encyclopedia
• Albuquerque`, Alfonso D'
• Alfonso I.
• Alfonso III.
•   (only first 3 shown)
The Catholic Encyclopedia
• Alfonso Capecelatro
• Alfonso de Valdés
• Alfonso de Zamora
•   (only first 3 shown)
The Jewish Encyclopedia
• Alfonso
• Alfonso Burgensis
• Alfonso Complutensis
•   (only first 3 shown)

A mathematician of uncertain date, author of a treatise on squaring the circle, extant in a manuscript in the British Museum (additional manuscripts, 26,984). Alfonso claims in the prefatory remarks to have found and demonstrated the possibility of constructing a plane figure, equal—not merely approximately, but exactly—to the area of a given circle. He professes to have put an end to all doubts on the subject, such as were entertained by Aristotle, and controverts the opinions of Ibn Roshd and Ibn Sina, who had declared the demonstration to be impossible.