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In differential geometry, a G2 manifold is a seven-dimensional Riemannian manifold with holonomy group contained in G2. The group is one of the five exceptional simple Lie groups. It can be described as the automorphism group of the octonions, or equivalently, as a proper subgroup of special orthogonal group SO(7) that preserves a spinor in the eight-dimensional spinor representation or lastly as the subgroup of the general linear group GL(7) which preserves the non-degenerate 3-form , the associative form. The Hodge dual, is then a parallel 4-form, the coassociative form. These forms are calibrations in the sense of Reese Harvey and H. Blaine Lawson, and thus define special classes of 3- and 4-dimensional submanifolds.

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  • G2 manifold (en)
  • G2-многообразие (ru)
  • Variedade G2 (pt)
  • G2-mångfald (sv)
  • G2-многовид (uk)
rdfs:comment
  • In differential geometry, a G2 manifold is a seven-dimensional Riemannian manifold with holonomy group contained in G2. The group is one of the five exceptional simple Lie groups. It can be described as the automorphism group of the octonions, or equivalently, as a proper subgroup of special orthogonal group SO(7) that preserves a spinor in the eight-dimensional spinor representation or lastly as the subgroup of the general linear group GL(7) which preserves the non-degenerate 3-form , the associative form. The Hodge dual, is then a parallel 4-form, the coassociative form. These forms are calibrations in the sense of Reese Harvey and H. Blaine Lawson, and thus define special classes of 3- and 4-dimensional submanifolds. (en)
  • Na geometria de Riemann, a variedade G2 é uma variedade Riemanniana cujo está contido no grupo de Lie G2 excepcional. O grupo de holonomia de uma variedade de Riemanniana é um grupo de Lie compacto que, em certo sentido, dá uma medida global da curvatura local da variedade. Se assumirmos certas condições favoráveis na variedade e em sua métrica, então, um dos cinco grupos de Lie excepcionais, apenas G2 poderá aparecer como um grupo de holonomia. (pt)
  • En G2-mångfald, även känd som Joyce-mångfald, är en sjudimensionell Riemannmångfald.De används inom strängteorins M-teori för att kompaktifiera de sju extra rumsdimensionerna som finns i denna 11-dimensionella teori. Detta kan jämföras med hur Calabi-Yau-mångfalder används på de 10-dimensionella supersträngteorierna (sv)
  • -многовид — семивимірний рімановий многовид з групою голономій або її підгрупою. Вони мають важливе значення в теорії струн, зокрема в М-теорії. -многовиди мають нульову кривину Річчі, орієнтовані і мають спінорну структуру. (uk)
  • -многообразие — семимерное риманово многообразие с группой голономий или её подгруппой.Они имеют важное значение в теории струн, в частности в М-теории. -многообразия имеют нулевую кривизну Риччи, ориентируемы и обладают спинорной структурой. (ru)
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  • In differential geometry, a G2 manifold is a seven-dimensional Riemannian manifold with holonomy group contained in G2. The group is one of the five exceptional simple Lie groups. It can be described as the automorphism group of the octonions, or equivalently, as a proper subgroup of special orthogonal group SO(7) that preserves a spinor in the eight-dimensional spinor representation or lastly as the subgroup of the general linear group GL(7) which preserves the non-degenerate 3-form , the associative form. The Hodge dual, is then a parallel 4-form, the coassociative form. These forms are calibrations in the sense of Reese Harvey and H. Blaine Lawson, and thus define special classes of 3- and 4-dimensional submanifolds. (en)
  • Na geometria de Riemann, a variedade G2 é uma variedade Riemanniana cujo está contido no grupo de Lie G2 excepcional. O grupo de holonomia de uma variedade de Riemanniana é um grupo de Lie compacto que, em certo sentido, dá uma medida global da curvatura local da variedade. Se assumirmos certas condições favoráveis na variedade e em sua métrica, então, um dos cinco grupos de Lie excepcionais, apenas G2 poderá aparecer como um grupo de holonomia. (pt)
  • En G2-mångfald, även känd som Joyce-mångfald, är en sjudimensionell Riemannmångfald.De används inom strängteorins M-teori för att kompaktifiera de sju extra rumsdimensionerna som finns i denna 11-dimensionella teori. Detta kan jämföras med hur Calabi-Yau-mångfalder används på de 10-dimensionella supersträngteorierna (sv)
  • -многовид — семивимірний рімановий многовид з групою голономій або її підгрупою. Вони мають важливе значення в теорії струн, зокрема в М-теорії. -многовиди мають нульову кривину Річчі, орієнтовані і мають спінорну структуру. (uk)
  • -многообразие — семимерное риманово многообразие с группой голономий или её подгруппой.Они имеют важное значение в теории струн, в частности в М-теории. -многообразия имеют нулевую кривизну Риччи, ориентируемы и обладают спинорной структурой. (ru)
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