Geodesic
The mathematical encyclopaedia of the 15th century, Arithmetical operations, fractions, progressions, linear equations and roots of real numbers, according to the Codex Vindobonensis phil. gr. 65 of the 15th century
Review of the National Center for Digitization, Tome 12 (2008) no. 1.

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I present some few results of my study on the mathematical content of the published part (f. 11r–126r) [8] of the Codex Vindobonensis phil. Graecus 65 (Tractatus Mathematicus Vindobonensis Graecus or TractMathVindGr) which the author is anonymous. The other part f. 126v-140r. has been published by H. Hunger and K. Vogel in 1963. This 15th century (1436) Byzantine MS includes the solution of problems of practical arithmetic, and algebra, the roots of which can be traced back to antiquity and their comparison with modern mathematical methods and terminology [9] reveals -apart from some differences- many identities and similarities showing the unbroken continuity of mathematical tradition through the centuries. 
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     title = {The mathematical encyclopaedia of the 15th century, {Arithmetical} operations, fractions, progressions, linear equations and roots of real numbers, according to the {Codex} {Vindobonensis} phil. gr. 65 of the 15th century},
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Maria D. Chalkou. The mathematical encyclopaedia of the 15th century, Arithmetical operations, fractions, progressions, linear equations and roots of real numbers, according to the Codex Vindobonensis phil. gr. 65 of the 15th century. Review of the National Center for Digitization, Tome 12 (2008) no. 1. http://geodesic.mathdoc.fr/item/NCD_2008_12_1_a15/