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https://twitter.com/_julesh_/status/1321043594137001984 

prathyvsh

https://arxiv.org/pdf/2009.14576.pdf

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Used the symbol V to signify containment.

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https://en.wikipedia.org/wiki/Topical_logic

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https://grahamshawcross.com/2012/12/12/visual-thinking/

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https://en.wikipedia.org/wiki/Marshall_Islands_stick_chart https://en.wikipedia.org/wiki/Quipu

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An article that claims it to be a myth is available here: https://pdfs.semanticscholar.org/08f0/05a973ac17412b53cfa972e187819a740771.pdf

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https://en.wikipedia.org/wiki/Egyptian_algebra#Aha_problems,_linear_equations_and_false_position

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https://www.maa.org/press/periodicals/convergence/mathematical-treasures-johann-faulhabers-academia-algebrae

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