Questions tagged [mathematics]

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

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1answer
23 views

Given “A implies B”, is “B implies A” “the other hand” or “the other side”?

I asked a question just now, where x = 2 → x² = 4 is true where "→" means "implies", x = 2 "implies" x² = 4, on the other hand, x² = 4 does not "imply" x = 2 in general, where the ...
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1answer
25 views

Doubt on the construction of a sentence

I am writing a document with some mathematics and I need help with the construction of a sentence. Is it correct to write "the function f measures the failure of the space M to be smooth"? I am not ...
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3answers
58 views

Is the verifying if a math equation is reasonable called “proof” or “justification” or both or something else?

this question comes from this post is the whole procedure called "proof" or "justification" or both or something else?
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0answers
21 views

Which one is more grammatical, “5 of them are 0” or “5 of them are 0s”?

this question comes from this post. In this specific case, the Σ contains six given values, and 5 of them are 0 in this context, which one is more grammatical, "5 of them are 0" or "5 of them ...
3
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1answer
165 views

How to write or read powers (math) by words? [duplicate]

What's the way to write or to read power (math) it in words? Does "powered by" is correct? For example: "2 powered by 5 divided by 2 powered by 3." works? Also "What 4 powered by 3 does equal to?...
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1answer
28 views

What does “from 30% off” mean?

"Shop everything you need for fashion - from 30% off" This is a banner. Does "from 30% off" mean the discount rate starts from 30%? Or does this mean "products from 30% off", which means products ...
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2answers
40 views

How do I describe a rotation of a triangle in natural language clearly and concisely?

I am asking for a formula for the rotation of a triangle in this post I am concerned about if I describe the question clearly and concisely, by saying which formula could be used to get the x ...
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3answers
42 views

Correct way to refer to solve an equation

I am a mathematician and I have a question about how to say correctly in English the next preceding: Let x=(...)(,,,) If we clear away the first parenthesis we get: (...)=x/(,,,,) The “clear ...
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2answers
112 views

What is the word for interior with a circle

I'd like to know what is the word to describe the entire interior within a circle. Circle is for the boundary only and does not include the interior of it.
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1answer
20 views

Is 'vertex' the correct term for peak (and valley) point on a curve?

This is about mathematical terminology in English. A simple curving line can have a top peak and a bottom valley. What is the correct term to use for the top/bottom point? In my native tongue, we ...
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1answer
43 views

Minus and plus a specific temperature degree (weather)

When we are going to say the weather temperature is below 0 degrees we use X degrees below zero or minus X degrees, but what about the contrary case? For instance we would probably say something ...
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2answers
33 views

Two to the three or two to the third?

I wonder if we can say "two to the three" to indicate 2 to the 3rd power. Here are my attempts to search on Google for it: And "two to the third" seems also OK: Which one do you usually use?
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1answer
30 views

What's the word for a new symbol, or usage of a new symbol?

Neologism is defined as: a new word, expression, or usage. In mathematics, there are new symbols created every year, and new usages for those symbols. Is there a word for a new symbol or usage, like ...
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1answer
23 views

“What is the probability both houses will be completed after 7 weeks?” meaning

When the question asks if the houses will be completed "after 7 weeks", someone says; it isn't asking if it will take greater than 7 weeks to complete the houses. "After 7 weeks" means "as soon as ...
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1answer
28 views

Usage of “it is” in formal, mathematical language

I have come across a scientific paper written by non-native speakers where some mathematical formulas are introduced by "it is". For example: Proof of Theorem X. Assume xyz. [Long mathematical ...
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1answer
32 views

“the matrix, M” Vs “M matrix”

I would like to understand how to refer to a given matrix in my English sentence. The matrix, M, refers to model A. or M matrix refers to model A. Which one is correct?
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3answers
61 views

Right preposition for: Evaluation of a function at 0 “in/at” its first argument [closed]

Consider a function f(x,y) defined on X x Y. One says that f(0,y) is the evaluation of f at 0 ... ... in its first argument ...at its first argument (none of these) My problem using searching ...
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2answers
48 views

Confusion between “where” and “with”

When I am reading some articles related to engineering or mathematics, I see many times the usage of "where" and "with" interchangeably. For example, f is the utility function mapping from S to R, ...
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2answers
21 views

looking for an alternative verb: computing the ratio of A and B

Maybe this is the native German speaker in me, but I am looking for an alternative verb to use, when I want to write: We compute the ratio of A and B. I am not happy with the verbs to compute/to ...
2
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1answer
24 views

Word for a value incremented by certain amount?

When we take a number and multiply it by 10 we get a value ten times the original. Then, what do we call the result of adding 10 to a previous value? i.e., what can I put in place of the ellipsis in ...
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1answer
43 views

“The statement is witnessed”

The derivability of a given statement can be justified by exhibiting a derivation tree [...] For example, if [ some definitions ] then the derivability of the statement if t then false else ...
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1answer
118 views

40 percent of X's Y: Is the percentage about X or Y?

Some 40 percent of people's "first memory" happened at an age when it wasn't possible to create memories. Source Context shows the percentage is about the people. The word memory, being singular, ...
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1answer
59 views

In math, how to express the tangent contact with the function

In math, I want to say that there is no possibility that an asymptote will be a tangent to the function. How should I write it?
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3answers
2k views

What is a non-prime number greater than 1 called in English?

I know that this a math question, but as it is really a very basic math concept I think any English user would know it, and it must be more related to English than knowing the math. We call a number ...
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4answers
2k views

How to describe a sample of one person?

Statistically, how to describe a theory making from one's own experience and haven't been tested by others? A sample of one? A one-person sample? Googling both phrases doesn't yield any meaningful ...
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1answer
188 views

What does “a declining rate of increase in” mean?

Context: These figures demonstrate a declining rate of increase in arrivals (in 2006, arrivals fell by 4 per cent) and more significantly in receipts, with a significant reduction in per person ...
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1answer
50 views

Possessive case in 'Jacobi identity'

I am not sure this is the right place to ask, but I give it a try anyway. I am reading a book about how to write math. At some point the author shows the grammar rule for the possessive case: e.g. ...
2
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1answer
34 views

How to pronounce A'B'C'?

Triangles ABC and A'B'C' are similar. Given: m' > m. How to pronounce ' (штрих in Russian)?
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1answer
364 views

Plural of a mathematical variable

How should I write the plural of a mathematical variable? E.g., in these sentences: The values of f(ui|uj) are independent for different [uj/ujs/uj's]. The values of f(ui|uj) are independent for ...
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1answer
52 views

percentage, rate, or ratio which is correct?

My salary for last month was $1,000 and for this month was $1,100, that is, my salary increased by 10%. In this case, which of the following is correct? The rate/ratio/percentage of change in my ...
2
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1answer
42 views

Word for clusters of a node in a hierarchy

Consider a hierarchy of clusters, in which the leaves are nodes. How can I refer to all the the clusters that contain a node? In other words, for a node I want to refer to its direct cluster, the ...
0
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1answer
59 views

What is an equation that consists of a proportionality symbol called? [closed]

When I want to refer to an equation similar to this image, what term should I use? Is it correct to say "Equation 3", although the equation contains a proportionality symbol?
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1answer
51 views

Using none for three or more nos. in mathematics

Which form is correct? None of A,B or C divides X or None of A,B and C divides X
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1answer
94 views

Is there a name indicating the following graph?

I know that the following graph is called a "Histogram". On the other hand, what ist the name of the following graph? I think this is one of the most common graphs, but I do not know this graph's ...
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5answers
608 views

Arithmetic expressions: singular or plural?

Five and two make/makes seven. Five times two is/are ten. Five minus two leave/leaves three. Which ones are correct? Could someone explain the logic behind them?
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2answers
82 views

Galois Theory — an implied genitive or not genitive at all?

In the field of mathematics there are many concepts named after certain individuals: the Pythagoras's theorem, Galois theory, Hilbert space and so forth. In my native tongue of Finnish the person's ...
2
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2answers
60 views

Can the difference in velocities be called as “velocities difference”?

Tortoises walk with the speed of 0.133 m/s. Rabbits run with the speed of 20 m/s. The difference in their speed is Δv = 20 - 0.133 ≈ 20 m/s. Can I say the speeds difference/velocities difference of ...
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1answer
44 views

“it modulo” meaning in Math context?

What is the meaning of this sentence? Since the sum can be large, find it modulo 109 + 7.
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2answers
76 views

What is the exact terminology for the four basic mathematical operations?

In my native language we have clearly defined and official terms for the operands involved in mathematical calculations. I am talking about the basic four arithmetic operations addition, subtraction, ...
4
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1answer
67 views

A kids-friendly, nontechnical alternative to the term “arithmetic operations”?

The term "arithmetic operations" from basic grammar school mathematics is highly formal and technical in my ears. In my native Danish language it translates into: The arithmetic operations = De ...
2
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2answers
44 views

My really old wonder: “defined by” v.s. “defined as”

I understand the following sentence: The rule was defined as ~~~~ by John. It can be shortened by omitting "as ~~~~" or "by John", like The rule was defined as ~~~~. The rule was defined ...
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1answer
40 views

How is a number with measure unit named

I am trying to figure out how a number together with measure unit name could be called as a whole. "Named number" is definitely not the right term. Examples: 20,5 m 15 kg -17 °C 0,00073 kg/L/°C The ...
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2answers
1k views

Negative numbers: “minus” or “negative”?

I noticed that when negative number are used in speech, there are two dominant patterns. Taking "-10" as an example, in some cases it is pronounced "negative ten", while in others it is "minus ten". ...
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2answers
159 views

Say ABCDE is a pentagon. Is “ABCDE” the name of this pentagon?

This could be the start of a maths' exercise: "ABCDE is a pentagon." In french, we would say "nom" (name) of the polygon to refer to "ABCDE", while "nature" of the polygon would refer to "pentagon". ...
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4answers
9k views

Do digits after the decimal point have a specific name?

I would like to know if there's a name for "digits after the decimal point" (in only one or two words). For instance in french these digits are called "décimales". I've found "decimal places", but I ...
2
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1answer
150 views

What do you call the reflection of a point through a line? Reflecting/reflection point? [closed]

I want to write a sentence with math contents. X, Y are points, and m is a line. 1. X is the reflecting point of Y with respect to m. 2. X is the reflection point of Y with respect to m. Which ...
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2answers
453 views

until July 28th - meaning

That's all the homework UNTIL July 28th When we say until July 28th , do we count day 28 as well? or does it say all assignments were marked before day 28? While we are it , do we say day 28th or ...
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1answer
74 views

English fraction ex) one third etc

I know when comparing two things using multiplicative numerals, some usages like the following sentences are possible. This book is twice the price of that book. This book is twice as expensive ...
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3answers
852 views

What does the phrase “to within” mean?

While I was reading the book 'Introduction to Algorithms by CLRS', I came across the sentence: ...is equal to g(n) to within a constant factor. I've seen something about it in Merriam-Webster, ...
2
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2answers
394 views

Hyphens after Abbreviations and Foreign Letters

Are hyphens used correctly in the examples below? In other words, is there a rule in English that either requires or allows these hyphenations. In my area of research, there is what is called the ...