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Questions of the kind "What's the name for a X that satisfies property Y?"
6
votes
1
answer
1k
views
Löwner-John Ellipsoid: incribed and circumscribed
I have two questions about the
Löwner-John ellipsoid, one just terminology, the other
more substantive.
Let $K$ be a convex body in $\mathbb{R}^d$.
Q1. …
25
votes
3
answers
12k
views
Why is a ring called a "ring"?
Why is a ring called "ring" (or Zahlring in German)? There seems to (naive) me nothing more ring-like to a ring than there is to a group or a field. I am particularly interested to learn why the wor …
11
votes
2
answers
2k
views
Great polyhedra: What does "great" signify?
Great Cubicuboctahedron
Great Icosacronic Hexecontahedron
Great Rhombic Triacontahedron
Great Snub Icosidodecahedron
Great Stellated Dodecahedron
Great Triakis Octahedron
...
There are many polyhedr …
3
votes
1
answer
595
views
Node-edge coloring of graphs
There must be work on this concept, but I am not finding it through
searches, perhaps using the wrong terminology.
…
67
votes
16
answers
9k
views
What do named "tricks" share?
There are a number of theorems or lemmas or mathematical ideas that come to be known as eponymous
tricks, a term which in this context is in no sense derogatory.
Here is a list of 11 such tricks (the …