• Bulletin of the Korean Mathematical Society
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• v.49 no.6
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• pp.1335-1348
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• 2012

We prove a Hardy inequality related to Carnot-Carath$\acute{e}$odory distance on H-type groups based on a representation formula on such groups.

• Journal of the Korean Mathematical Society
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• v.37 no.2
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• pp.269-284
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• 2000

We discuss completeness with respect to the Caratheodory distance, the Kobayashi distance and the Beraman distance, respectively.