# Tagged Questions

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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### Describe a mathematical problem

How can I make the bold part of this sentence less awful? The symbolic regression problem is the problem of finding a closed form that models... You can move around the second part of the ...
200 views

### Which alternative is best English? [on hold]

Are there any specific rules in English about how to refer to something that was introduced in the previous sentence? For example, compare these three sentences: Let X and Y be random variables ...
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### Diversify the preposition “by” in “model X by smth.”

Which prepositions can be used with the verb "model" when speaking about something being an abstract description of something else? As an example, let us consider the following sentences: The ...
92 views

### Word for equivalence preserving transformations of equations

I am searching for a mathematical term describing an algebraic manipulation of an equation which preserves equivalence. So while adding 2 to both sides of an equation results in an equivalent equation,...
29 views

### Plural for math notations

I have a question about the usage of plural in mathematics in the following context. Suppose we have functions \$f_1, f_2, \cdots\$. Which sentences is collect (if any)? Among the functions \$f_i\$...
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### In mathematics: is “associate to” correct? [closed]

In mathematical writing, I was used to We associate to the object C a vector space V(C) Now I found a question, Acceptable uses for "associated with" or "associated to", ...
596 views

### How to pronounce “×” in “12 × 3 mm²”? [closed]

I have this expression: 12 × 3 mm². I guess that it should not be pronounced as "twelve multiplied by three millimeters squared". I've tried to google it already but it seemed to be difficult ...
1k 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 ...
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### What do you call a pair of diagonally-opposite points on a square or rectangle, relative to the other pair of points?

Suppose there is a rectangle with corners N,E,S,W, names assigned in a clockwise fashion, as you might expect. N and S are diametrically opposite, as are E and W. Is there a term that describes ...
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### List of inverted letters and their applications

Upside-down letters, as in ∀, and left-side-right letters, as in ∃, are used in mathematics and logic to indicate for all and there exists. Do you know other examples of such inversions ...
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### Which verb to use with “The variable [verb] a value”?

Consider the mathematical expression x=5. What would be the correct sentence? The variable x is the value 5. The variable x has the value 5. The variable x takes the value 5. [Slightly ...
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### Can anyone advise on a guide to the usage of “enote”?

I am looking to use "enote" in a mathematical description where the symbol occurs before the concept, and denote seems inappropriate. (I suppose with rewriting this can be overcome, but that's a ...
6k views

### Is it correct to say “times” in this context?

Consider the following: Math teacher: "How can we turn 42 into 420 through multiplication?" Student: "You times it by ten!" Is this usage of times correct? I hear it so often that I suspect ...
18k 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 ...
29k 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 operation,...
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### Word for when set A is not a subset or superset of set B [closed]

I'm looking for a word to describe the relationship between two sets when set A is neither a subset nor superset of set B. Obviously if a technical term exists, great. Otherwise, imagine someone has ...
33 views

### Is it a correct word about mathematical problems

Is the following word correct? Question) x = 3y, y = 4t Considering the equations above, represent x with respect to t. Answer) x = 12t Is the bold sentence correct?
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### Words describing constancy

Using only a single word in each case, I'm attempting to describe two different variations involving constancy of a certain attribute: Variation of an object without changing its weight. Variation ...
283 views

### What's the word for the small square indicating a right angle in a geometric figure?

I'm talking about something in geometry notation and/or drafting, I think. It's the mini right-angle shape you can draw within an angle to indicate that it's ninety degrees. E.g., the mark denoting ...
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### Is “more-point function” correct? (mathematics)

How do I describe in English (i.e. without mathematical symbols) the following mathematical object, if I want to stress comparison with the two-point function? The n-point Green's function for n>...
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### Is 'sum' an okay replacement for 'problem'?

I've seen some people using the word sum as a substitute for the word problem, in a mathematical context even though the problem does not explicitly involve the addition operation. For example, We ...
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### Apostrophe for plurals with mathematical notation [duplicate]

I am a mathematics student. I sometimes see professors write something like the following (both in class as well as in formal publications). Let a1, a2, ..., an be natural numbers. Assume that all ...
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### How to express the fact that clauses in a compound logical statement are connected by “AND”?

Say, I have three independent logical clauses, a, b, and c, and they are connected into one logical statement (a∧b∧c). How do I express this succinctly? Can I say, "a, b, and c are connected ...
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### How do you read powers and roots?

I'm wondering how do you read the following expressions. I have some guesses but I'd like someone to confirm whether my guesses are right and if there are other ways to read those numbers other than ...
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### An adjective for something which satsifies given conditions

I'm looking for a single-word adjective which means 'satisfies the given conditions'. For example, the condition might be, "Your number must be less than 10." Here the number 2 would be a _____ number....
8k views

### “integer multiple” vs. “integral multiple”

Nine is an integer multiple of three. Nine is an integral multiple of three. Which is more common? If both are accepted, what's the subtle difference between them?
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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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### “Under the condition that” within the realm of probaility [closed]

SO, I have a math question, kind of at least, where I think the wording is getting in the way. Determine the probability that First condition under the condition that Second condition. I ...
2k views

### What do you call nested circles that are not concentric?

The circles in the image don't have the same center, so they are not concentric. Is there a word to describe circles that overlap (completely or not) so that enclosed circles are smaller than the ...
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### Word For the Process of Finding Return on Investment

I am told that if I invest \$20 in this Apple Stock, in one years time there is a: 10% chance I'll get back \$25 10% chance I'll get back \$20 30% chance I'll get back \$15 50% chance I'll get back \$10 ...
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### Rankings out of integer and a half?

When giving items a score its not uncommon to restrict values to make scoring easier. For example: I can give a movie a score out of 5 stars using only integers, i.e. 0,1,2,3,4,5. Or I can give a ...
2k views

### Using “of” before “whether” and general usage of “whether”

I was reading a mathematics text, and I came across a phrase which I thought was written incorrectly. There was a part of a sentence: ... it begs the question whether or not A=B. and I feel this ...
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### Inequality vs. Inequation, Equation vs. Equality

When talking about statements that two terms are mathematically (un-)equal (e.g., 1 = 1, 1 < 2, or 1 != 2), what is the correct notion for such mathematical statements? Are there special cases w.r....
225 views

### Does “unioned” exist in the context of math?

In mathematics, if you have the sets A and B, you can build a new set C which is the union of A and B. I would like to say, something like Set C consists of the unioned sets A and B. but the ...
8k views

### How to read “E = (mc)²” so as not to mistake for “E = mc²”

According to one of the questions already asked on EL&U, “E = mc²” is read as E equals M C squared. How do we read “E = (mc)²” so that it is not mistaken for “E = mc²”?
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### Word for “having horizontal and vertical directions” that a mathematician can use

As the title says, I'm looking for a word that means "having horizontal and vertical directions." The catch is that I'm a mathematician trying to describe notions similar to "horizontality" and "...
325 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. ...
1k 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 ...
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### Quarter Asteroidal Hypocycloid, in Layman's Terms

Take a gander at the hypocycloid. You may recognize the shape from the logo of an American football team... My question is, how do you describe the tip of one such shape in common parlance (in ...
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### “Total” relates to “sum” as X relates to “product”

In algebra, there is (as I see it) a subtle difference between “sum” and “total”: a sum is a term consisting of several summands that are added up,e.g., “5+5”, whereas the total is the result of this ...
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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 quad-...
9k views

### How can I form a word like “quadruple” for any number I want?

I'm not sure what these are called, but how can I form a word like "quadruple" for any number I want? Like 5× as much is quintuple, what is 31× as much or 147× as much? I want to know how they are ...
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### How can I describe the intersection between a circle and a curve?

I have a curve C and a point x in the curve. At the point x, I draw a circle B with radius r and centered at point x. That circle B will cut/intersection (with) the curve C as red sub-curve line. I ...
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### Word to describe a mathematical variable that repeats, like an angle or time

In mathematics a variable can be said to be constrained if it must lie within certain bounds, for example: 0 < x < 1 (the variable x is constrained: it lies between zero and one) However ...
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### Why do we hyphenate between numbers? Example: twenty-six

I have found many places that list the various rules on using hyphens in math, but nothing to explain why we have the rule. I have some students who are asking and I would like to be able to give ...
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### 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 ...
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### Statistician's word for a distribution curve tailing less steeply to left or right

I know the word normal distribution. But what does a statistician call it when the curve of the distribution tails less steeply (ie falls more gradually) to the left or right?
16k views

### What do you call a disk with a hole in the middle?

Compact Discs, washers and Aerobie frisbees are all disks with a hole in the middle. Is there a word (either mathematical or not) to describe this shape? I mean the specific case of a round hole in a ...