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clarify definition of Potenzmenge #58

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clarify definition of Potenzmenge #58

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2 changes: 1 addition & 1 deletion Game/Levels/SetTheory/L15_Powerset.lean
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Expand Up @@ -12,7 +12,7 @@ Introduction
"
Eine andere wichtige Menge ist die Potenzmenge einer Menge, welche als
`𝒫 A` geschrieben wird (`\\powerset`). Diese ist als `{S | S ⊆ A}` definiert, also
alle Mengen, die in $A$ enthalten sind.
alle Mengen, die Teilmengen von $A$ sind.

Eines der wichtigsten Lemmas ist `mem_powerset_iff: x ∈ 𝒫 s ↔ x ⊆ s` welches
im Grunde die Definition einsetzt.
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