Proof of the Associativity of the Supremum (Sup{ Sup{ a, b }, c } = Sup{ a, Sup{ b, c } })

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In this exercise we will proof that the Supremum of two elements is associative.

⏰ Timeline
00:00 Exercise
00:20 Partial order
00:45 Supremum
01:22 Sketch
02:59 Gathering information
05:10 Conclusion

🔢 Statement to proof
Sup{ Sup{ a, b }, c } = Sup{ a, Sup{ b, c } }

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