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Related: it's about history of mathematical symbols #879051

One good example is the symbol of equality, “=.” This relation was mostly expressed with words in the beginning. Later [René Descartes in France started using the rotated Taurus symbol, “∝,” while [Gottfried Wilhelm] Leibniz in Germany used a wedgelike shape. And [before Descartes and Leibniz] Robert Recorde in [the U.K.] invented the equality sign we use today, though in an elongated form.
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How is it related? Does one symbol get used more in applied rather than in academic mathematics?

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Didn't say from that point. The OP is talking about Maths here and is also about Mathematical symbols.

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