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Connections with exotic holonomy
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| Zeitschriftentitel: | Transactions of the American Mathematical Society |
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| Personen und Körperschaften: | |
| In: | Transactions of the American Mathematical Society, 345, 1994, 1, S. 293-321 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Mathematical Society (AMS)
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| Schlagwörter: |
| Zusammenfassung: | <p>Berger [Ber] partially classified the possible irreducible holonomy representations of torsion free connections on the tangent bundle of a manifold. However, it was shown by Bryant [Bry] that Berger’s list is incomplete. Connections whose holonomy is not contained on Berger’s list are called <italic>exotic</italic>. We investigate a certain 4-dimensional exotic holonomy representation of <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper S l left-parenthesis 2 comma double-struck upper R right-parenthesis"> <mml:semantics> <mml:mrow> <mml:mi>S</mml:mi> <mml:mi>l</mml:mi> <mml:mo stretchy="false">(</mml:mo> <mml:mn>2</mml:mn> <mml:mo>,</mml:mo> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="double-struck">R</mml:mi> </mml:mrow> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> <mml:annotation encoding="application/x-tex">Sl(2,\mathbb {R})</mml:annotation> </mml:semantics> </mml:math> </inline-formula>. We show that connections with this holonomy are never complete and do not exist on compact manifolds. We give explicit descriptions of these connections on an open dense set and compute their groups of symmetry.</p> |
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| Umfang: | 293-321 |
| ISSN: |
1088-6850
0002-9947 |
| DOI: | 10.1090/s0002-9947-1994-1250825-x |