Questions tagged [mathematics]

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

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

Example questions

503 questions
81
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4 answers

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, not how you pronounce its use. If y = 2, it is 'x…
daisy
  • 2,241
20
votes
8 answers

Why do we say "lowest common denominator" when we mean "greatest common divisor"?

For example, we could say HTML is the lowest common denominator on the web", because one can be sure all web browsers are able to render HTML (but not Flash or Java). If I want my web page to show properly everywhere, I know I can use maximum set of…
Danko Durbić
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17
votes
2 answers

Should I use hyphens with prefixes like "sub" and "semi"?

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 sub-zero, while in the Mathematical contexts there is…
Mikasa
  • 601
8
votes
6 answers

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 it may be correct. I'm sure the reason for this…
user11550
6
votes
2 answers

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 value?
stefan
  • 202
6
votes
5 answers

Why do we say 24 x 7 x 365 rather than 24 x 365?

I saw that when we are saying that something is available at all days of the week at all hours, we say its available 24 x 7, and when its available every day (or, every week) of the year at all hours, we call its there 24 x 7 x 365 I know that 24 x…
5
votes
1 answer

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 ?
barak manos
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4
votes
5 answers

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, squaring both sides does not. In German, there…
黄雨伞
  • 148
3
votes
1 answer

Saying "into" instead of "times" when talking about multiplication

I'm studying a series on algorithms taught by "Abdul Bari" on youtube Here is when he says "A into B" to talk about multiplying A by B I know why some say "a times b" when talking about multiplication. I'm curious about the expression "a into b".…
3
votes
1 answer

"by induction hypothesis" or "by THE induction hypothesis"

One of the techniques for proving statements in mathematics is "mathematical induction" (wikipedia entry). Very informally and not precisely speaking, when conducting a proof using this technique, (1) one proves that the statement is true in the…
3
votes
2 answers

Function defined on/over/from A to B

how should one read in plain English? In the following sentence, for example: "let f be a function defined on/over/from/(other) A to/(other) B"? edit: This post has been tagged as a possible duplicate to this question. However, I originally I…
Mogu
  • 131
3
votes
5 answers

An element "lives" in a space

I have seen the expression, "X is the Hilbert space in which the element x lives". As a native speaker, this seems quite sloppy to me. Is there a more succinct way to formulate this expression?
3
votes
4 answers

How to read (x - y) ^ 2

I don't know how to read this expression: (x-y)2 — sometimes rendered in computer code or plain text as (x-y)^2 According to this answer: How to read x^y I should read that: x minus y to the power of two But I'm not sure it's the way that native…
3
votes
2 answers

submatrix or sub-matrix?

I 've seen several times "submatrix" in code and manuals. However, whenever I write in my Latex editor, it gets underlined in red, as a spelling mistake. Same things happens now, just as I am writing my first question here. On the other hand, 've…
gsamaras
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