xia@lemmy.sdf.org to Showerthoughts@lemmy.worldEnglish · 23 hours agoImaginary numbers are more real than infinity.message-squaremessage-square25fedilinkarrow-up165
arrow-up165message-squareImaginary numbers are more real than infinity.xia@lemmy.sdf.org to Showerthoughts@lemmy.worldEnglish · 23 hours agomessage-square25fedilink
minus-squareLeate_Wonceslace@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up1·edit-220 hours 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.