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Results tagged with terminology
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user 32389
Questions of the kind "What's the name for a X that satisfies property Y?"
5
votes
Where does the name "R-matrix" come from?
According to http://link.springer.com/article/10.1007%2FBF01076717 the method of the classical r-matrix first appeared in the paper "On the complete integrability of the Landau-Lifshitz equation" by E …
- 16.5k
22
votes
Accepted
Is there a standard notation for off-diagonal transpose?
In http://arxiv.org/abs/math/0701936 (Fuchsian equations of type DN, by Vasily Golyshev and Jan Stienstra) the transpose of the matrix $A$ with respect to the anti-diagonal is denoted by $A^\tau$. It …
- 16.5k
2
votes
Accepted
Reference request for generalization of groups with out identity element?
I think such structures are called nonunital semigroups. See, for example,
ftp://ftp.math.ethz.ch/EMIS/journals/MPRIA/2000/pa100i2/pdf/100210ai.pdf (Non-Unital Semigroup Crossed Products, by N.S. Lars …
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