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Questions tagged [terminology]

Questions on the usage and meaning of words in mathematics, the names for mathematical entities, and other such questions.

Terminology is a discipline that studies, among other things, the development of terms and their interrelationships. This tag is intended to be used for questions on the usage and meaning of words in mathematics, the names for mathematical entities, and other such questions.

8534 questions
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Confusion about the definition of upper bounds of a set

I am confused about upper bounds of a set. Consider a set: $A = ${$1, 2, 3, 4, 5, 6, 7$} How many upperbounds are there? Does the upperbound need to be in the set? Also about supremum. What is the difference between a supremum and an upper bound?
Anon
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What is usually meant by logit scale or log scale?

This question is more about the math terminology than about the math itself. Say we have x = logit(p). If one says "logit scale" does he mean: the scale of p, or the scale of x, i.e. the scale of logit(p)? The same principle would probably apply…
Tomas
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reintepreting n-dimensional spaces as k-dimensional spaces of (n-k)-dimensional subspaces

Say you have defined a 3D space, which consists of 0D points. What is it called when you reinterpret it as a 1D space, in which each "point" is a 2D subspace of the original 3D space?
fumigail
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What is the difference between self-avoiding and simple in FASS (space filling) curves?

Although it does not appear to be widely used, I occasionally see the acronym FASS used to describe certain curves that are space-filling, self-avoiding, simple, and self-similar. What is the difference between a curve that is self-avoiding and…
David
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How to write 'and' in mathematical language?

How to write 'and' in mathematical language? I'm not from the field of math, but I needed to write two very simple equations in the same small line and I'm afraid it'll be confusing since they're very close to each other. So I found it best to put a…
Arithmetic-Enthusiast
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Correct usage of "fit X to Y"

This question is basic. That's partially because English is not my mother tongue. Suppose I have a set of discrete data and a formula with one or more fitting parameters. Now which is correct? I fit the discrete data to the formula. I fit the…
apadana
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Graph terminology

If $B$ is the subgraph of $A$, can we say $A$ is the "parent" graph or the "original" graph? Context: "In a subgraph, the vertices and edges are a subset of the parent graph." Not sure if it's right since we're not dealing with trees.
A_for_ Abacus
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Is there a symbol for immeasurability?

I don't know if "immeasurability" is the term I'm after. Whenever I search for "immeasurable" I get references to infinity, which is not what I'm looking for. If I say I'm 74% certain of something or 76% certain of something, although there is a…
CJ Dennis
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Is there a common name for an object whose image is either 1 or -1?

Is there a common way to express the idea of "$\pm 1$" using words, ideally without spelling out "plus or minus one". Not that the absolute value is one, but that the value is either 1 or -1. For example, without using the symbols "$\pm 1$", how…
The Big Lebesgue
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Name for the maximum distance between elements?

I have a set $S$ and a distance metric $d$, and I need the least upper bound on the distance between any two elements of the set: $$ \inf \left\{ x: \forall a, b\in S, x \ge d(a, b) \right\} $$ I'm going to need to use this quantity a lot in a…
AJMansfield
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What should I call $X$ when $U = X \times Y$

I'd like to say that $X$ is xyz of $U$ when $U = X \times Y$. I've learnt that $U$ can be called as the direct product of $X$ and $Y$. But I've not learned how to call $X$ or $Y$.
Light Yagmi
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I need help with the name of this rule

I need to prove it for $7$ points. If $a^x = a^z$ then $x = z$. What's the name of this rule? I need a proof.
Naser Kot
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What do the letters a, b and c stand for in linear programming?

From the definition of linear programming: Cost function = c1x1 + c2x2 + ... + cnxn Constraints = a11x1 + a12x2 + ... + a1nxn <= b1 ... am1x1 + am2x2 + ... + amnxn <= bm What do the letters a, b and c stand for? I assume c stands for cost and a…
user2108462
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Meaning of the term "Sledgehammer"

I know a Sledgehammer is a special type of hammer, but I still do not quite get the exact meaning of the word in such a paragraphs as: The computational sledgehammer par excellence is the spectral sequence; these are essential in the…
Javier Arias
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Is there a term for any number that is $2^n$?

I am looking for a term for numbers that have a base of $2$ with any power so for example, $2,4,8,16,32,\cdots$. I would say a base $2$ number but am under the assumption that that refers to binary numbers. My best idea so far is a power of $2$…
jhello
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