Dirac's conjectureIn this note, we give a counter-example of a conjecture proposed by R. Dipper and J. Du in [2, (1.9)].doi:10.1007/s00013-002-8270-9J. HuBirkhäuser VerlagArchiv Der MathematikJ. Hu, `A counter-example of Dipper-Du's conjecture' Arch. Math. (Basel) 78 (2002)...
Dirac猜想Based on the canonical symmetries of constrained Hamiltonian systems, a counter-example to a conjecture of Dirac is given. Using the canonical first Noether theorem and canonical Noether identities, we have shown that Dirac's conjecture fails in that example. There is no linearization of ...
In particular, this gives a counterexample to the conjecture of G.Swarup that a finitely presented one-ended subgroup of a word hyperbolic group is quasiconvex if and only if it has finite index in its virtual normalizer. 关键词: hyperbolic group, quasiconvex subgroup, limit set DOI: ...
Markov, and A. Nechaev defined the recursive codes and obtained some results that allowed one to conjecture the existence of recursive MDS-codes of dimension 2 and length 4 over any finite alphabet of cardinality q {2, 6}. This conjecture remained open only for q ∈ ...
For solutions of semilinear elliptic equations, we show the link that exists between global minimizers on Rn−1 and the existence of nontrivial monotonic solutions on Rn. We prove that the existence of a symmetric global minimizer on Rn−1 implies the existence of a nonplanar monotonic solut...
theconjecture;weconstructaHamiltoniancircleactiononacompact symplecticmanifoldforwhichDuistermaat-Heckmanfunctionisnot log-concave.Thisconstructioncamefrominvestigatinganexampleof DusaMcDuffofa6-manifoldwithacirclevaluedmomentmap[MD]. Iusehernotationwhereverpossible. ...
conjecture, but insofar as one does have such a cue in mind, the base rate information is not relevant, and it is reasonable to ignore it. While it may not be reasonable to believe x implies y, if you do believe it, then it is reasonable to believe y is true when you perceive x....
aNash’s first encounter with George Friedrich Bernard Riemann and his famous conjecture took place when Hash was 14, probably lying on the den floor in front of the radio, reading Bell’s Men of Mathematics. 正在翻译,请等待...[translate] ...
Following Patterson and Wiedemann [10], we find new counter-examples for a conjecture of Mykkelveit [9] related to the covering radius of the first order Reed-Muller code. One of them has a remarkable algebraic structure. Author information ...
A story of an example We give an example of an asymptotically $AdS_2imes S^2$ metric, in the sense of \\\cite{GG}, which satisfies the Null Energy Condition but is not exactly $AdS_2imes S^2$. It is therefore a counterexample to a conjecture of Maldacena... P Pankka 被引量: ...