# 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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### What is the name of the Division line? [closed]

What is the name of the horizontal division line? Is there a name for it other than "division line?
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### Find or invent a term for “Completely intersecting minus one”

I'm writing a paper that frequently references regions on a string, and these regions often intersect. I need to succinctly describe regions that almost completely intersect. For example, given the ...
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### Which is the correct form: “Parameter set”, “parameters set”, or “parameters' set”?

I have sets of parameters like (1, 2, 3, 5) or (3.14, 2.73, 1.44, 1.73). They are named, but I do not think it makes any difference. Which form is the correct one to call one general case or example ...
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### Term for pertaining to the polar direction

I am discussing a system (in a scientific context) which is described with spherical polar coordinates. This has a radial coordinate r, a polar angle θ and a azimuth angle φ. A diagram can be found on ...
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### Taking a tenner from neighbour

Let's define the first number as "ab" and the second number as "cd". In "ab"-"cd" proces, if "b" is smaller than "d", we add 10 to "b" and reduce 1 from "a". In Turkish, we called it "taking a ...
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### “Function defined on/over the set A”

For the mathematically inclined fellows: If f is a function whose domain is the set A, do you say that f is defined on A or over A? Do both prepositions apply here or is the use of one of them ...
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### A fraction less than something? [closed]

I encountered a question which is phrased: A book store stocks 1/5 of its books as fiction works, and 1/3 less than the fiction books as self-help books. What fraction of books are fiction and ...
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### The Condition Holds vs is Satisfied vs Obtains

In mathematical/scientific texts, conditions that are true (within context) are said to hold be satisfied obtain (the last one was news for me) My question is whether there is nuance in meaning ...
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### Circle is to cylinder as ellipse is to what?

What do you call the geometric shape obtained when you give an ellipse thickness? Or in other words, a circle is to a cylinder as an ellipse is to what?
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### Correct phrase for “Chain of equations”

In math, one often writes a = b = c = d to prove that a=d. How is such a sequence of equations called in English? In German, there is “Gleichungskette”, but the direct translation “Chain of ...
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### Understanding smaller parts without understanding what they mean when put together

I am looking for an which adjective/adverb/phrase which refers to understanding all of the smaller components of something without understanding what they mean when put together. "We understand every ...
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### What is a word similar to “multiplier” but for addition (or subtraction) [closed]

A multiplier is a number by which another number is multiplied. What do you call a number by which another number is added or subtracted?
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### 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 ...
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### Need we use “sums” in sentences whenever they describe the sum of plural objects? [duplicate]

Need we use sums in the case that the sentence describes the sum of plural objects? For example, “100 centimeters sums to one meter” versus “100 centimeters sum to one meter”. They both seem make ...
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### dividend/divisor vs. numerator/denominator [closed]

From Wikipedia: In the expression a ÷ b = c, a is called the dividend or numerator, b the divisor or denominator and the result c is called the quotient. What's most common (in the context of ...
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### Capitalization and hyphenation for prefixed adjectives derived from proper names in mathematics

In mathematics, it often occurs that the last names of famous mathematicians are used as adjectives with mathematical meaning. Most of these adjectives are written with a capital letter. Then, ...
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### Collection of mathematical formulas

What is the correct term for a collection of mathematical formulas in the form of a (small) handbook? I'm looking for a translation of the German noun “Formelsammlung”. Several dictionarys suggest ...
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### Is there a term for “distinguishing between different concepts through the use of different, though synonymous, words”?

Background: A friend mentioned that he wanted to organise a board gaming tournament with 21 players. He opined that there ought to be a way to schedule seven 3-player games so that each player plays ...
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### “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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### “books” vs. “more books”

I have a 2nd-grader and I am trying to help him with his math work but I think I might be making things a lot more complicated than they need to be. The question asks: Meg needs _ books to have as ...
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### What is an adjective for a very large negative number?

A number that is very large (but not infinite) such as 1,000,000,000,000,000 could be called huge, enormous, large, big, gigantic, etc. A number that is very small such as 0.000000001 could be called ...
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### Is it appropriate to state a mathematical fact with the word “whenever”?

From time to time, in Math textbook, I encounter the statement using whenever, e.g. on page 12 of Horst Herrlich's Axiom of Choice "A has an upper bound in X whenever each pair of elements of A has an ...
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### Noun form of “umbilical”?

In Differential Geometry (a branch of mathematics) there exists the notion of an umbilical point. Is there a noun corresponding to the adjective umbilical? Could I write something like "It follows by ...
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### Using the word “difference” in the meaning “result of subtraction” taking into account the negative values

The result of subtraction is called "difference". At first glance it might seem that it shouldn't cause an ambiguity over the value denoted by this word; until we stumble upon subtractions that ...
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### 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 ...
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### What does “evaluate” mean when used in Mathematical problems? [closed]

When solving Mathematical problems, I usually come across with titles like: Evaluate the expression below. Evaluate this: ∜[(log2(48 / 3) + 1)2 - 9] Evaluate the following integral. When I ...
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### 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 ...
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### Why abbreviation for “Definition” as “Def^n” (math context)

I've seen in math and physics lectures delivered in English, that people use to abreviate the commonly very used word "Definition" by "Def n"(Def superscript n). What's the meaning of this n? That is, ...
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### Hyphens after the prefixes “non-” and “anti-” in mathematics

Is there a convention when to attach the prefixes non- and anti- to mathematical terms using a hyphen and when without? One uses non-zero but also noncommutative. Likewise for anti-. I no longer ...
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### “Hence”, “therefore” and “so” in mathematical proofs

It seems to me that "so" is seldom used in math proofs. Instead, "hence" and "therefore" are used very often, even repeatedly appearing in several sentences in a row. So I wonder if my feeling is ...
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### What's the difference between perimeter and circumference? [closed]

What's the difference between perimeter and circumference when they mean the total length of the boundary of a two-dimensional geometric shape?
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### Why don't years have commas?

For example, if one asks "what's two thousand plus two thousand", one could write it like this: 2,000 + 2,000 But when one writes the date: January 2, 2000 So why do we put commas when ...
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### 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 ...
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### How to read parentheses equation [closed]

I have problems with reading mathematical equations in which there are parentheses; could anybody help me? For example: (x−a) (x+b) = 5 (x−a) + 2 (a+10) = z 2 + (10−a) d =...
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### What do you call the maximum number of recent values used for calculating an average [closed]

A sensor measures some physical quantity (like temperature). The measured value is tapped every 100ms or so. An average is calculated over the x most recently measured values. I.e. with every new ...
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### “Parametrise” or “parameterise” a curve?

In British English, which one is correct? Does one parameterise a curve or parametrise it?
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### What's the word for the property of being divisible by a particular number? [closed]

Example: Since x is even (i.e., divisible by 2), its --word-- is true. Since y is odd, y's --word-- is false. The description suggests 'moddity', but there was another word for it... BTW, I ...
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### “Both of” vs. just “both” with mathematical symbols

In mathematical writing we use letters to denote the mathematical objects we are writing about. I wonder how to use "both of" in the following phrase: Both of I and I' are irreducible ideals. ...
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### word for bringing a number to its absolute value

In mathematics, the absolute value of a number n is either −n if n is negative or n itself if otherwise. Is there a single word or shorter description for the replacement of n with its absolute ...
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### Inverse proportions, but the other way around [closed]

The title sucks, I know... Anyway: As part of a game I'm making, one of the buildings decreases the time it takes to build other things. Like so: At level 0: Full time At level 1: Full time / 2 At ...
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### 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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### 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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### “Nominator” or “Numerator”? [closed]

Consider the fraction 3/7. In Mathematics, "7" in the expression is called "denominator" of the fraction. But in the case of "3", some people call it "nominator", and some call it "numerator". Which ...
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### Should I use hyphens with prefixes like “sub” and “semi”? [duplicate]

Possible Duplicate: When is it necessary to use a hyphen in writing a compound word? Some English texts, use the prefix sub put before a given proper word with "-" between them, for example ...
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### When do we use “suppose” and when “let”?

As a matter of fact, these two words are used a lot in mathematical contexts. Often, we use them interchangeably; but I do realize that that might not be correct. What should I do about this matter? ...
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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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### Explanation of sentence [closed]

I don't understand this sentence.... I know the meaning of all words except distinct... I looked in dictionary.. but I don't understand..:/ Output the number of distinct values when considered MOD 42,...