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Questions of the kind "What's the name for a X that satisfies property Y?"

10 votes
1 answer
200 views

Verbal description, or terminology, for the ${\mathcal L}_p$-spaces of Lindenstrauss and Pel...

My question is about the terminology or description that specialists in Banach space theory would use to refer to these spaces, when asking each other questions or giving each other outlines of proofs. …
Yemon Choi's user avatar
  • 25.8k
7 votes
0 answers
226 views

Terminology for vanishing of Hochschild homology with symmetric coefficients?

by most readers as saying $H^n(A,M)=0$ for all $n\geq 2$ and all $A$-bimodules $M$ this even has an accepted name ("quasi-free", I think, although corrections are welcome) However, I am looking for terminology … But to my knowledge, although "homology with symmetric coefficients vanishes in all degrees $> n$" clearly has a flavour of being "dimension $\leq n$ in some sense", I don't know of any existing terminology
Yemon Choi's user avatar
  • 25.8k
6 votes
2 answers
460 views

Terminology: Banach spaces equipped with continuous associative product?

So my question is this: do these kinds of algebra have a standard name, and where are the established sources for such terminology? … Rather, I need some idea of whether one choice of terminology is standard, and hence least likely to cause confusion/irritation to the intended audience, should I decide to pursue this course. …
5 votes
1 answer
376 views

Translation of "le nilradicalisé de g"

I suspect the answer should be obvious to those who, unlike me, know some basic Lie group/Lie algebra terminology. …
Yemon Choi's user avatar
  • 25.8k
4 votes
1 answer
157 views

Terminology: jointly completely bounded?

This question has a subjective component but I would like answers that try to stick to concrete observable facts, such as which papers use which terminology. … My question is this: is there a current consensus on which terminology to use? …
Yemon Choi's user avatar
  • 25.8k
4 votes
0 answers
81 views

Question about terminology for a class of "self-modular" mappings between rings

Is there standard notation or terminology for functions $\theta:R\to S$ that satisfy $$\theta(ar)=\theta(a)\theta(r) \quad,\quad \theta(rb)=\theta(r)\theta(b) \quad\hbox{for all $a,b\in D$ and all $r\in … Note that I am not really asking for people's opinions on inventing new terminology, but checking among the research community if there is an existing accepted name for these objects, which my coauthors …
Yemon Choi's user avatar
  • 25.8k
3 votes
0 answers
225 views

Is there a standard name for this index 2 subgroup in an affine group over a finite field of...

Fix an odd prime power $q$, fix a generator of the multiplicative group ${\mathbb F}_q^\times$, let $H$ be the subgroup generated by the square of this element, and form the semi-direct product ${\mat …
Yemon Choi's user avatar
  • 25.8k
3 votes
0 answers
858 views

A "surjective implies injective" property for endomorphism rings of modules

Fix a unital commutative ring $R$ and consider a left $R$-module $M$. $\newcommand{\End}{{\rm End}}$ (For the indirect application I have in mind, which would require another post, $\End_R(M)$ will n …
Yemon Choi's user avatar
  • 25.8k
3 votes
0 answers
92 views

Terminology for set systems: "trace" or "projection"?

Is the terminology used in Bollobas's book now the standard one? If so, have people seen the notion of "subtrace" before? … So my question is really about whether traces and subtraces are just as standard, or whether this is a convenient bit of terminology popular within a particular cluster of researchers. …
Yemon Choi's user avatar
  • 25.8k
3 votes
0 answers
101 views

Terminology for the "natural probability measure" on the set of irreducible characters of a ...

To be specific: if $G$ is a finite group and $\operatorname{Irr}(G)$ the set of its irreducible characters (over the complex field) then we know that $$ 1 = \sum_{\phi \in {\rm Irr}(G)} \frac{(d_\phi) …
Yemon Choi's user avatar
  • 25.8k
2 votes
1 answer
301 views

Is there existing terminology for this technical condition on semilattices?

The terminology is my own, because I don't know if there is existing terminology that I should be using instead. …
Yemon Choi's user avatar
  • 25.8k