• carbon_dated
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    3 years ago

    I never saw that notation. I learned to write ]a, b] instead.

    • xarvos
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      3 years ago

      That’s French notation iirc. More intuitive imo, but its parentheses are also mismatching.

      • carbon_dated
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        3 years ago

        Yeah, they do mismatch. I just mentioned it because I was unfamiliar with the notation in the image. You could also write {x ∊ ℝ : x > a ⋀ x ≤ b} or [a, b]\{a}