< Intervall < Negatives Intervall
Es sei ein Intervall in einem angeordneten Körper . Beschreibe die Menge
![{\displaystyle {}I=[a,b]}](../../../I/d9415455379ef65b8bcc5629a5e182b7e8909e52.svg)
![{\displaystyle {}M={\left\{x\in K\mid -x\in [a,b]\right\}}\,}](../../../I/2a7025aafe24545cff2e2a36b1e7fa667e9ffce5.svg)
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