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“... Hopf invariant HIρ on [A,Y] which extends Hopf's definition when ρ is a comultiplication. Then HI=HIρ...”
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Subjects: “...Hopf invariants...”
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“...We propose a topological defect or instanton solution with nonzero Hopf invariant to the 3+1D non...”
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Subjects: “...Hopf invariant...”
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“...[pt] Arnold no seu trabalho The asymptotic Hopf Invariant and its applications de 1986, considerou...”
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“... The asymptotic Hopf Invariant and its applications de 1986, considerou sobre um domínio (ômega maiúsculo...”
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“... self-linking number and helicity integral which relates the linking of umbilic lines to the Hopf...”
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“... has non-trivial helicity. The MHD soliton solution (Kamchatnov, 1982) is based on the Hopf invariant...”
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“... the cohomology ring of a space, and we introduce the Hopf invariant, allowing us to narrow down the n to either 1...”
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“... , 0 , 0 $$ \overrightarrow{\phi}=\left(\pm 1,0,0\right) $$ , respectively. Then the Hopf invariant can...”
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“... the Hopf invariant of a map from a 3-manifold to a high-genus surface, and determining whether there is a...”
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“... space of a fibrewise coHopf sphere bundle in terms of that of its base, and a generalised Hopf invariant...”
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