# Tagged Questions

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### Rhetoric vs. Mathematics: ellipsis/ellipse, parable/parabola, hyperbole/hyperbola

Do ellipsis, parable, and hyperbole from rhetoric have anything in common with the geometric curves ellipse, parabola, and hyperbola used in mathematics? There are three geometric curves known as ...
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### Differentiate and Integrate

Further to my last question about the history of calculus terms, I am wondering about the etymology of differentiate the etymology of integrate why we speak of a "derivative", but we "differentiate" ...
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### Fluents and Fluxions

When calculus was first being developed, the terms "fluent" and "fluxion" appeared quite often in the Newtonian works. I am wanting to know the etymology behind these words. I assume that "fluents" ...
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### Why does “quadratic” describe second power while “quad” usually describes “four”?

In mathematics, quadratic means "involving the second and no higher power of an unknown quantity or variable". But the prefix quad- usually describes something that has to do with four, such as ...
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### Etymology of “chain rule” (calculus)

In calculus there is a formula known as the chain rule, used for differentiating composite functions. What is the origin of this expression?
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### Antonym of all: none, not all, both?

If you ask someone what the opposite of "all" was, most times the answer will be "none", such as the example of "no one" is the opposite of "everyone". There are three antonyms for "all" on ...
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### Trapezium/trapezoid — why are the US/UK definitions swapped around?

These are the US definitions... Trapezoid — a 4-sided flat shape with straight sides that has a pair of opposite sides parallel. Trapezium — a 4-sided flat shape with straight sides and NO parallel ...
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### Etymology of “magma” in abstract algebra

Magma is one of those beautiful words of Greek origin (μάγμα) that arouses the child and the wild in me, making me think of volcanoes. I just found out, though, that it is also used in mathematics to ...
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### Why is the common meaning of logical terms ('and', 'or') incongruous from that in math?

If someone wrote that they want "nuts and bolts", they would get a bunch of hardware they could attach things with. If this was software or math, they would only receive nothing, because things are ...
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### What reasoning is behind the names of the trigonometric functions “sine”, “secant” and “tangent”?

The meanings of these words are very similar: the sine of an angle in a right triangle is the ratio of the opposite side to the hypotenuse; the secant is the ratio of the hypotenuse to the adjacent ...
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### Origin of square and cube as verbs

Whence did the verbs 'square' and 'cube', in the sense (if there exist others) of 'to the second power' and 'to the third power' respectively, originate? There is some degree of similarity between the ...
3k views

### Where does the word “totient” come from?

In math we learn about the "totient function". It rhymes with "quotient" when math teachers pronounce it. But I cannot find the definition or etymology of this word in any dictionary, nor on any ...