"Haar space" meaning in English

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        "A finite-dimensional subspace V of 𝒞(X, 𝕂), where X is a compact space and 𝕂 either the real numbers or the complex numbers, such that for any given f∈𝒞(X, 𝕂) there is exactly one element of V that approximates f \"best\", i.e. with minimum distance to f in supremum norm."
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        "(approximation theory) A finite-dimensional subspace V of 𝒞(X, 𝕂), where X is a compact space and 𝕂 either the real numbers or the complex numbers, such that for any given f∈𝒞(X, 𝕂) there is exactly one element of V that approximates f \"best\", i.e. with minimum distance to f in supremum norm."
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      "synonyms": [
        {
          "word": "Chebyshev space"
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  "word": "Haar space"
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        "A finite-dimensional subspace V of 𝒞(X, 𝕂), where X is a compact space and 𝕂 either the real numbers or the complex numbers, such that for any given f∈𝒞(X, 𝕂) there is exactly one element of V that approximates f \"best\", i.e. with minimum distance to f in supremum norm."
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