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What is the origin of the negation ( ¬ ) operator from logic?

If vague resemblance is enough, then "$¬$" resembles "$-$", which denotes negation in arithmetic. Lambert in Sechs Versuche einer Zeichenkunst in der Vernunftlehre (1782) and Boole ...
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-3 votes

Who said $\pi$ is a constant since it is not even a real number?

The first Hebrew sentence of the Bible (Genesis 1:1) conains 7 words composed of 22 letters.
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2 votes
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Origin of the term "affixe"/"affix" in the geometric treatment of complex numbers

According to Eduard Study and Élie Cartan [1], it was Cauchy who introduced the term affixe in Sur la quantité géométrique $\mathrm{i} = 1_{\frac{\pi}{2}}$, et sur la réduction d'une quantité ...
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Was the word 'gravity' an invention of Newton?

This is a supplement to the two (good) answers by @Mauro Allegranza and @Viktor Blasjo. Although these answers and the question now have some age to them, it seems worth clarifying them by adding some ...
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-2 votes

Was the word 'gravity' an invention of Newton?

So...Gravity isn't a real thing then. Neither is "gravitas". Who decided that it was a "thing"? Man? So much credit is given to a person who decides to over-anylize an apple ...
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7 votes
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Did Kronecker's "ganzen Zahlen" refer to whole numbers as natural numbers or integers?

TL; DR: the "ganzen Zahlen" refers to positive integers. Gauss, Dedekind and Cantor were reifying new mathematical objects obtained by explicit or implicit procedures, and then forgetting ...
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