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Connected Lie groups with many locally bounded finite-dimensional representations are linear

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In this paper, it is proved that the following conditions are equivalent for any connected Lie group:(i) G admits sufficiently many locally bounded (not necessarily continuous) finite-dimensional representations;(ii) G admits a faithful locally bounded (not necessarily continuos) finite-dimensional representation;(iii) G admits sufficiently many continuous finite-dimensional representations;(iv) G admits a continuous faithful finite-dimensional representation, i.e., G is a linear Lie group. The equivalence (iv)⇔(i) is somewhat surprising.

Abstract

In this paper, it is proved that the following conditions are equivalent for any connected Lie group:(i) G admits sufficiently many locally bounded (not necessarily continuous) finite-dimensional representations;(ii) G admits a faithful locally bounded (not necessarily continuos) finite-dimensional representation;(iii) G admits sufficiently many continuous finite-dimensional representations;(iv) G admits a continuous faithful finite-dimensional representation, i.e., G is a linear Lie group. The equivalence (iv)⇔(i) is somewhat surprising.

참고문헌 (22)

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  14. Alexander I. Shtern, "APPLICATIONS OF AUTOMATIC CONTINUITY RESULTS TO ANALOGS OF THE FREUDENTHAL–WEIL AND HOCHSCHILD THEOREMS", Advanced Studies in Contemporary Mathematics, 20(2), pp.203~212 (2010), 장전수학회
  15. A. I. Shtern, "Connected locally compact groups: Hochschild kernel and the faithfulness of locally bounded finite-dimensional representations", ~
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  18. Alexander I. Shtern, "VON NEUMANN KERNEL OF A CONNECTED LOCALLY COMPACT GROUP, REVISITED", Advanced Studies in Contemporary Mathematics, 20(3), pp.313~318 (2010), 장전수학회
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