"Helmholtz function" meaning in English

{
  "etymology_text": "For Hermann von Helmholtz, German physicist.",
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A transformation of the complex plane associated with fluid flow"
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        "(mathematics) A transformation of the complex plane associated with fluid flow"
      ],
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        "uncountable"
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      "topics": [
        "mathematics",
        "sciences"
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      ],
      "glosses": [
        "The equation used to express Helmholtz free energy"
      ],
      "id": "en-Helmholtz_function-en-noun-c0tFGfk7",
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          "Helmholtz free energy",
          "Helmholtz free energy"
        ]
      ],
      "raw_glosses": [
        "(physics) The equation used to express Helmholtz free energy"
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "wikipedia": [
    "Hermann von Helmholtz"
  ],
  "word": "Helmholtz function"
}

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  "etymology_text": "For Hermann von Helmholtz, German physicist.",
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  "lang_code": "en",
  "pos": "noun",
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        "en:Mathematics"
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      "glosses": [
        "A transformation of the complex plane associated with fluid flow"
      ],
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        [
          "mathematics",
          "mathematics"
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          "transformation",
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          "complex plane",
          "complex plane"
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        "(mathematics) A transformation of the complex plane associated with fluid flow"
      ],
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        "mathematics",
        "sciences"
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        "(physics) The equation used to express Helmholtz free energy"
      ],
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        "uncountable"
      ],
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        "physics"
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}