"prehomogeneous" meaning in English

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  "etymology_text": "From pre- + homogeneous.",
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          "ref": "2015, Wen-Wei Li, “Zeta integrals, Schwartz spaces and local functional equations”, in arXiv:",
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        "Having an automorphism group with an open orbit."
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          "automorphism group",
          "automorphism group"
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        "(mathematics) Having an automorphism group with an open orbit."
      ],
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        "not-comparable"
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        "mathematics",
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      "wikipedia": [
        "en:prehomogeneous vector space"
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        "(mathematics) Having an automorphism group with an open orbit."
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