empty set

Summary

empty set is a set^[1]. It draws 319 Wikipedia views per month (set category, ranking #4 of 16).^[2]

Key Facts

• empty set's image is recorded as Empty set symbol.svg^[3].
• empty set's instance of is recorded as set^[4].
• empty set's instance of is recorded as open set^[5].
• empty set's instance of is recorded as closed set^[6].
• empty set's instance of is recorded as null set^[7].
• empty set's instance of is recorded as 0-ad^[8].
• empty set's instance of is recorded as finite set^[9].
• empty set's part of is recorded as list of types of sets^[10].
• empty set's Commons category is recorded as Nested set V4^[11].
• empty set's said to be the same as is recorded as 0-ad^[12].
• empty set's opposite of is recorded as non-empty set^[13].
• empty set's Freebase ID is recorded as /m/02ly0^[14].
• empty set's notation is recorded as Q87524418^[15].
• empty set's described by source is recorded as ISO 80000-2:2019 Quantities and units — Part 2: Mathematics^[16].
• empty set's different from is recorded as Ø^[17].
• empty set's different from is recorded as singleton of 0^[18].
• empty set's different from is recorded as null set^[19].
• empty set's TeX string is recorded as \empty^[20].
• empty set's TeX string is recorded as \emptyset^[21].
• empty set's TeX string is recorded as \varnothing^[22].
• empty set's MathWorld ID is recorded as EmptySet^[23].
• empty set's set cardinality is recorded as zero^[24].
• empty set's nLab ID is recorded as empty set^[25].
• empty set's on focus list of Wikimedia project is recorded as Wikipedia:Vital articles/Level/4^[26].
• empty set's maintained by WikiProject is recorded as WikiProject Mathematics^[27].

Why It Matters

empty set draws 319 Wikipedia views per month (set category, ranking #4 of 16).^[2] It has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.^[28] It is known by 19 alternative names across languages and contexts.^[29]