xia@lemmy.sdf.org to Showerthoughts@lemmy.worldEnglish · 1 day agoImaginary numbers are more real than infinity.message-squaremessage-square27fedilinkarrow-up177arrow-down113
arrow-up164arrow-down1message-squareImaginary numbers are more real than infinity.xia@lemmy.sdf.org to Showerthoughts@lemmy.worldEnglish · 1 day agomessage-square27fedilink
minus-squareLeate_Wonceslace@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up1·edit-21 day agoA set is infinite exactly when there exists a proper subset whose cardinality is that of the set.
A set is infinite exactly when there exists a proper subset whose cardinality is that of the set.