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Logical graph (view source)

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**[http://www.helsinki.fi/science/commens/terms/graphlogi.html Logical Graph]

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* Dau, Frithjof

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*[http://dr-dau.net/index.shtml Dau, Frithjof]

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** [http://dr-dau.net/pc.shtml Existential Graphs as Moving ~~Picture Of~~ Thought] — Computer Animated Proof of Lebniz's Praeclarum Theorema

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**[http://dr-dau.net/eg_readings.shtml Peirce's Existential Graphs : Readings and Links]

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** Bibliography on Existential Graphs

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**[http://dr-dau.net/pc.shtml Existential Graphs as Moving Pictures of Thought] — Computer Animated Proof of Lebniz's Praeclarum Theorema

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*[http://mathworld.wolfram.com/ MathWorld ~~—~~ A Wolfram Web Resource]

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*[http://mathworld.wolfram.com/ MathWorld : A Wolfram Web Resource]

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** [http://mathworld.wolfram.com/about/author.html Weisstein, Eric W.], [http://mathworld.wolfram.com/Spencer-BrownForm.html Spencer-Brown Form]

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**[http://mathworld.wolfram.com/about/author.html Weisstein, Eric W.], [http://mathworld.wolfram.com/Spencer-BrownForm.html Spencer-Brown Form]

*[http://www.math.uic.edu/~kauffman/ Kauffman, Louis H.]

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