This tag is for questions about the usage and meaning of mathematical terminology and the names for mathematical entities in English.

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1
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1answer
156 views

In differentiation as in dy/dx what do you call y and x?

Like numerator / denominator, but for differentiation.
0
votes
1answer
83 views

How to express combinations using “any […] by […]”

I'm writing a text in which I need to repeat combinations of k out of n - for example, "any 2 out of 6" - but I think something the likes of "any 6 by 2" would be more appropriate since the subject is ...
16
votes
6answers
12k views

Does “either A or B ” preclude “both A and B”?

In mathematics, "A or B" includes "A and B". Does "either" mean "A or B but not (A and B)" or does it include the possibility of "A and B"? The context might be mathematics, formal logic or ordinary ...
1
vote
1answer
55 views

How did 'up to' evolve to mean 'regardless of', in maths?

Even the OED seems not to have featured it. I couldn't find an explanation on Etymonline. [Wikipedia:] If X is some property or process, the phrase "up to X" means "disregarding a possible ...
2
votes
1answer
59 views

Definite article in Maths: “(the) function f”

Is the definite article correct/necessary in sentences like the following? A line that intersects (the) circle C. We can see that (the) function f has a maximum at x=0. Draw a line past (the) edge E. ...
1
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3answers
61 views

Comma and arithmetics

Should one put a comma before an arithmetic operation? What about long expressions? Example: The final distance is equal to the initial distance plus initial velocity multiplied by time, plus half ...
4
votes
3answers
577 views

Is there a word for opposite numbers?

Example: -100 and +100 - is there a way of describing the relationship between these numbers? Obviously, I've already come up with "opposite", is there anything else? This is for use in an email. ...
0
votes
0answers
30 views

“derivative” is to “derive” as “primitive function” is to “?”

Basically, what is the opposite verb of "derive", i.e. "to take the primitive function of"? (Context: I'm trying to make wolframAlpha take the primitive of a function, but I can't get formulation ...
2
votes
1answer
35 views

If A subtends B, can B also subtend A?

I wrote: Things farther away subtend smaller angles at the eye. Wiktionary has this example of the usage of "subtend:" A 43° angle subtends an arc about ¾ meter long on a circle with a ...
0
votes
2answers
46 views

Should I use 'follow lemma (1)' or 'follow from lemma (1)'?

In mathematical papers, some theorems are proved based on some existing lemmas. Then, should I use Following lemma (1), we prove... or Following from lemma (1), we prove...
0
votes
1answer
46 views

When advertisers say product X has N times less 'thing' than product Y, what do they mean [duplicate]

Here is an example: NESTLÉ a+ SLIM Milk has 15 times less fat than regular toned milk. Source:http://www.nestle.in/brands/nestleaplusslim So the question is this: say regular toned milk has 100 ...
-1
votes
1answer
583 views

Adjectives that describe the general shape of fishes

My question has to do with the adjectives one can use to describe the very general shape of a fish if we think of these three axes: tail-to-head axis back-to-belly axis side-to-side axis Question ...
0
votes
2answers
46 views

Difference between “evaluate as” and “evaluate to”

Does the expression 1+1 evaluate as 2 or does it evaluate to 2? Is one (or both) of the above not proper English or misused in this context, or are they both okay?
-2
votes
1answer
39 views

using amidst in mathematic [closed]

I use a very formal writing style. If I want to say that I calculate a function between 5 times between each two points, can I use amid these ways? The function f(t) is calculated 5 times amidst ...
1
vote
1answer
76 views

Is there a word that means “derivative-able”?

I'm just curious, so is there a word that you could use to express that a mathematical function has a derivative?
1
vote
1answer
200 views

Do we have to use ordinals with largest/smallest?

In every-day language, I would say, "Give me the fifth largest pumpkin you have"; that is I would use the ordinal. However, this feels clunky in mathematical texts, especially when reading out loud: ...
101
votes
3answers
13k views

Why is “quadratic” used to describe second power when “quad” means “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 ...
1
vote
0answers
45 views

Where does the word “mean” come from in mathematics? [closed]

For the averages, mean, median and mode I can determine that median comes from latin for mid, mode comes from latin for measurement but cannot find where the word mean comes from. Is it an acronym? ...
5
votes
2answers
355 views

What comes after the ducentiquinquagintasexions?

Hypercomplex numbers that use the Cayley-Dickson construction seem to follow a Latin naming convention related to the size of the algebra (which is always a power of two). As an English.SE question, ...
1
vote
2answers
93 views

Genitive: with or without “the” [closed]

I would like to know which variant is correct: "Decimal expansion of the first generalized Euler's constant" "Decimal expansion of first generalized Euler's constant" "Decimal expansion of the ...
0
votes
0answers
36 views

Nonabelian or non-abelian?

I asked this question on Mathematics Stack Exchange (here) but I haven't had any luck so far. Allow me to copy the question: If I wanted to be scrupulous about correct spelling, is there any reason ...
1
vote
1answer
75 views

I want to write some mathematical sentences in the English language [closed]

I want to write these mathematical sentences in the pure English language: In this paper, for every vertex a v in G, we find a shortest path joining v and w in G. My proposed sentences are: In ...
0
votes
4answers
650 views

Is 'times it by' or 'minus it by' correct?

I'm always hearing math instructors, and students, use ‘times it by’ to describe multiplicative operations: “…To find the ratio, you times it by one hundred…” To hear other students phrasing ...
0
votes
3answers
629 views

Five percent VS The five percent [closed]

Five percent VS The five percent. Which one is correct and why? Because i.e. this page exists http://www.thetwopercent.com/ or the famous slogan ;) "we are the 99%.". However, on the official apple ...
1
vote
3answers
234 views

Words or digits? What is good style for numbers in mathematical writing?

What is considered good style for writing small numbers as words or digits in mathematical texts? I have three concrete examples, are there any differences between those? "M is a matroid of rank ...
5
votes
5answers
8k views

Divide two into four and Divide two by four

Why does "divide two into four" equal two, and "divide two by four" equal one half? Correct if I am wrong, but this what I have learned recently.
14
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11answers
5k views

What do you call a cylinder with a hole down the center?

Imagine a 3D cylinder, like a can. Now imagine that almost like an axle spot for a wheel, there's a hole shaped in a perfect circle going down the cylinder. That's the shape I have to figure out the ...
0
votes
1answer
99 views

Word for position and direction

I'm looking for a word that encapsulates both an object's position and direction. Similar words: a "point" has just a position. a "vector" has a direction and magnitude an "orientation" has just a ...
1
vote
5answers
949 views

What do you call a sequence of repeating numbers

For example, I have a sequence 77777777777 Is there a word in the dictionary to represent a sequence of repetitive/recurring numbers
2
votes
3answers
77 views

Can “paraxial” mean “axis-parallel”?

The Wiktionary lists under the meanings of paraxial: (mathematics) Parallel to one or more axes of the coordinate system paraxial rectangle The respective information was added ...
4
votes
4answers
313 views

Admitting a unique fixed point in math

I've noticed that some of my professors seem to like to use the term admit in the following sense (from the contraction mapping theorem): "If F is a contraction from a complete metric space to ...
3
votes
1answer
114 views

Why must the cent sign come after the value? [duplicate]

Is it pureley by convention that the dollar symbol ($) comes before the value and the cent symbol (¢) come after? For example $1.50 vs $1 and 50¢ Also would it ever be correct to write a value of ...
1
vote
1answer
382 views

What is the general term for “greater than or equal to” and “less than or equal to”?

We call this equation: A = B We call this inequality: A > B A < B What do we call this: A ≥ B A ≤ B ?
0
votes
1answer
66 views

What is the term for representing whole numbers with integers instead of English words?

For example, "I am giving you the ___ form". Where I am using numeric characters e.g., 1 instead of one. I don't think canonical exactly fits here because the English version is seems to be unique as ...
3
votes
1answer
44 views

Why do we have “Coulombic” but not “Coulombian”?

In physics, we have Coulombic interaction. Why do we have "Coulombic" but not "Coulombian"? At first, I think that because the letter b from Coulomb decides which suffix comes after it, but when I ...
2
votes
3answers
126 views

Term for numbers that have at least one non-zero significant digit after the decimal point?

So, a number that is nothing but fractions is "fractional". A number that has a whole number and a fraction is "mixed", if you want to call it that. And the portion after the decimal point is called ...
8
votes
5answers
8k views

“Lower number” vs. “smaller number”

Is −9 a smaller number than −8? And is −9 a lower number than −8? What is the difference between lower and smaller here?
6
votes
8answers
33k views

Why is “a 100% increase” the same amount as “a two-fold increase”?

and is such interpretation the norm? When something went from 4 units to 8 units, most authoritative sources seem to agree with the use of "a two-fold increase", even though what was actually ...
2
votes
3answers
19k views

“an hour and a half” or “one and a half hours”

Are both "an hour and a half" and "one and a half hours" correct? If so, is either more appropriate in different contexts? Example context: "The Superbowl starts in less than one and a half ...
0
votes
1answer
31 views

Use of “recast” in mathematics

Do we write the relationship recast, OR the relationship recasts? ("s" at the end) y = 3x       (1) Relationship (1) recast y−3x = ...
3
votes
1answer
195 views

Does rational come from ratio or ratio come from rational?

Going through law school we often used the latin phrase ratio decideni - meaning the reasoning of a decision. In this context we took the latin word ratio to mean thinking process. Recently I saw an ...
0
votes
2answers
78 views

An expression similar to “frame of reference”

I am trying to explain a mathematical point that is used for comparison such that all values are compared to it, like a "frame of reference". I've also thought of "pivot of comparison". Are any of ...
1
vote
1answer
58 views

What is the etymological history behind the mathematical “induction” versus the philosophical “inductive [reasoning]”? [closed]

Was talking about it in a (particularly off topic) university lecture on Emperical reasoning (deductive - our logic-math course, vs inductive - "gravity gets taken for granted"). A reason we were ...
0
votes
1answer
32 views

“conal” vs “conical”

Is there any difference in meaning, usage or frequency between the words "conal" and "conical" within a mathematical context, i.e. when talking about cones?
4
votes
5answers
1k views

Is there a prefix for “infinite”?

I was looking for a prefix I could prepend to a word to mean an infinite amount of the thing the word describes. I eventually found someone with the same question, and since there were no answers, I ...
2
votes
0answers
132 views

Is there a fraction prefix for “(one-)third”?

I am a mathematician, working with things called 1⁄k-regular polytopes, dubbed thus by Conway. For the case of k = 2, as in ½-regular, it is naturally pronounced and written half-regular. However, I ...
16
votes
4answers
14k views

How to read exponential expressions, e.g., “2^16”?

How do you say the mathematical function in English: x^y (or xy) For example, how do you say 2^16 (or 216) I know ^ means 'power' or 'exponentiate', but that is the name of the ...
6
votes
3answers
3k views

“Parametrise” or “parameterise” a curve?

In British English, which one is correct? Does one parameterise a curve or parametrise it?
1
vote
1answer
82 views

Use of articles in mathematical writing

I'm writing a section about some mathematical properties and have trouble with the use of articles (indefinite/definite/no). I could come up with the following variants, but don't know which one is ...
3
votes
7answers
2k views

Alternative to “minuend” and “subtrahend”

In math, I just learned that when performing subtraction, the terms for each number are as follows: minuend − subtrahend = difference I have never heard of minuend and subtrahend before, and I'm ...