Jonathan J. Crabtree

• Bharatiya Maths Multiplication on a Plane www.podometic.in

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幸运28Jonathan J. Crabtree

• DesCartesian Multiplication (via Bharatiya Maths)

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幸运28Jonathan J. Crabtree

• Indian Logic Meets Descartes' Multiplication via www.podo.in

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Jonathan J. Crabtree

• Baudhāyana Theorem

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Jonathan J. Crabtree

• Baudhāyana Theorem

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Jonathan J. Crabtree

• Baudhāyana Theorem works for circles as well as squares

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幸运28Jonathan J. Crabtree

• Indian Logic Meets Descartes' Multiplication Model

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Jonathan J. Crabtree

• Sarah's Circle

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Jonathan J. Crabtree

• Multiplication with a Curve (the parabola y = x^2)

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Jonathan J. Crabtree

• Re-Directing Descartes' 1637 Multiplication Part 1

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Jonathan J. Crabtree

• DesCartesian Division

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Jonathan J. Crabtree

• Descartes' Multiplication Model

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幸运28Jonathan J. Crabtree

• Re-Directing Descartes' Definition of Multiplication.

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Jonathan J. Crabtree

• The Multiplication Table Triangle

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Jonathan J. Crabtree

• DesCartesian Division (via newton)

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幸运28Jonathan J. Crabtree

• Descartes' 1637 Multiplication Part 2

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幸运28Jonathan J. Crabtree

• A Corollary to Pythagoras' Theorem. a◯ + b◯ = c◯

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幸运28Jonathan J. Crabtree

• An Introduction to PCV (Proportional Co-Variation)

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Jonathan J. Crabtree

• How to Square a Circle With Rope

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Jonathan J. Crabtree

• Is the Fundamental Theorem of Algebra a mirage?

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Jonathan J. Crabtree

• Pythagoras' Zipper

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幸运28Jonathan J. Crabtree

• Thales, Roots and Similar Triangles

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Jonathan J. Crabtree

• Square roots of negative ℝeal numbers

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Jonathan J. Crabtree

• A fun applet to see i, & the square root of −15

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Jonathan J. Crabtree