Unicode Symbol
unicode-symbol.com › u › 2205.html
∅ - empty set (u+2205) copy and paste - Unicode® symbol
The following table show specific meta-data that is known about this character.The u+2205 name is empty set emoji.
HotSymbol
hotsymbol.com › symbol › empty-set
∅ Empty Set copy and paste - HotSymbol
🤩 Copy and paste ∅ Empty Set symbol with unicode, HTML, CSS, HEX, Alt, shortcodes with just one click.
elementary set theory - Name of symbol of null set. - Mathematics Stack Exchange
What is the name of the symbol we use for empty set? Difference in notation of phi and void set? I found that symbols that we use for both are different but I know the name phi only. Not know the n... More on math.stackexchange.com
How do you write the null symbol or slashed zero without confusion in Norwegian/Danish?
The null set symbol was actually inspired by the Danish letter. At any rate, I can't imagine that it'd be more confusing than the cross product symbol and the letter x. More on reddit.com
4
8
May 12, 2016What is the strangest property of the empty set that you've ever encountered?
The fact that the entire universe of ZFC is just empty sets in trenchcoats. More on reddit.com
83
86
September 23, 2018Still confused why TOP uses this symbol "∅".
Nicolas bourbaki (the group) invented the "empty set" in mathematics, it is the symbol ø More on reddit.com
8
9
September 7, 2018Videos
Empty Set - YouTube
04:28
What is the Null Set? (Empty Set, Void set, ∅, {}) Axiomatic ...
04:35
What is the Power Set of the Empty Set? | Set Theory - YouTube
00:44
How to type Empty Set symbol in Word - YouTube
03:07
Why is the Empty Set a Subset of Every Set? | Set Theory, Subsets, ...
02:08
What is a Null Set | Is Null Set a Subset of Every Set? | Don't ...
Reddit
reddit.com › r/mathematics › what letter is the empty set symbol ∅ to you?
r/mathematics on Reddit: What letter is the empty set symbol ∅ to you?
April 6, 2024 - So, the empty set symbol ∅ its own thing, it's not phi, it's not a slashed O... it's an empty set symbol.
i2symbol
i2symbol.com › abc-123 › 0 › x2205-empty-set
Empty Set ∅ (Copy and Paste)
Release the ALT key to insert the symbol ∅. If your keyboard does not have a numeric keypad, hold Fn + ALT while typing the code 8709. Download the Empty Set ∅ as PNG images in multiple sizes.
Wikipedia
en.wikipedia.org › wiki › Null_sign
Null sign - Wikipedia
14 hours ago - U+03F4 ϴ GREEK CAPITAL THETA SYMBOL. ... U+04E9 ө CYRILLIC SMALL LETTER BARRED O are a part of the Cyrillic script. It is used in the IPA for close-mid central rounded vowel. ... U+0444 ф CYRILLIC SMALL LETTER EF are a part of the Cyrillic script. The letter took the place of fita ( ... U+0473 ѳ CYRILLIC SMALL LETTER FITA), a letter of Early Cyrillic alphabet in modern usages. In mathematics, the null sign (∅) denotes the empty set...
SYMBL
symbl.cc › homepage › unicode › blocks › mathematical operators › miscellaneous mathematical symbols › empty set
∅ Empty Set symbol meaning, copy and paste unicode ...
February 12, 2026 - Empty Set. Mathematical Operators. The symbol “Empty Set” is included in the “Miscellaneous mathematical symbols” subblock of the “Mathematical Operators” block and was approved as part of Unicode version 1.1 in 1993.
Symbol Hippo
symbolhippo.com › home › ø | empty set symbol (meaning, how to type on keyboard, & more)
Ø | Empty Set Symbol (Meaning, How To Type on Keyboard, & More) - Symbol Hippo
January 23, 2022 - Empty Set or Null set symbol (Ø) is a mathematical symbol used to indicate a unique set that has no elements. It is denoted by O with a forward slash.
Codepoints
codepoints.net › unicode › basic multilingual plane › mathematical operators › u+2205 empty set: ∅ – unicode
U+2205 EMPTY SET: ∅ – Unicode
The CLDR project calls this character “empty set” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: empty, mathematics, operator, set.
Wumbo
wumbo.net › symbols › empty-set
Empty Set Symbol (∅)
Empty set symbol.
Copy and Paste Symbols
copyandpastesymbols.net › empty-set-symbol.html
∅ Empty Set Symbol - Simple copy and paste
Get the best collection of empty set symbol with Dec Code, Hex Code, & Unicode.
Piliapp
piliapp.com › symbols › null-sign
∅ Null Sign - PiliApp
Mac: Press Option + 0. Linux: Press Ctrl + Shift + u, then type 2205 and press Enter. HTML: Use the named entity ∅ or the numeric entity ∅. LaTeX: To type the Null Sign in LaTeX, use the command \emptyset. Home | Symbol | Font generator | Clock & Timer clock | roulette & Draw lots ...
Unicode Compart
compart.com › en › unicode › U+2205
“∅” U+2205 Empty Set Unicode Character
U+2205 is the unicode hex value of the character Empty Set. Char U+2205, Encodings, HTML Entitys:∅,∅,∅, UTF-8 (hex), UTF-16 (hex), UTF-32 (hex)
Wikipedia
en.wikipedia.org › wiki › Null_symbol
Null symbol - Wikipedia
June 28, 2025 - Null symbol may refer to: Null character, U+0000 <control-0000> , Null sign (∅), the empty set · Null (SQL) (ω), a special marker and keyword NULL in SQL · Empty string (λ, Λ, or ε), in formal language theory · Null (disambiguation) Ø (disambiguation) Dotted circle – Non-significant ...
Quora
quora.com › What-is-the-name-of-the-symbol-used-for-expressing-empty-sets
What is the name of the symbol used for expressing empty sets? - Quora
Answer: It’s called the “empty set symbol.” I wish I could give you some cool name like “octothorpe”, but it was based on the letter Ø from Danish, where it is a Close-mid front rounded vowel and “the name of this letter is the same as the sound it represents” [1]. The first ...
Emoji.gg
emoji.gg › symbol › empty-set
∅ Empty Set Symbol - Meaning, Copy & Paste
The empty set symbol (∅) representing the unique set containing no elements. It is fundamental in set theory and mathematics to denote the concept of an empty collection or null set.
Mathematics Monster
mathematics-monster.com › symbols › Empty-Set.html
The "Empty Set (∅)" Symbol - Mathematics Monster
Empty Set is used to denote the concept named. Codes: Alt 8709, HTML ∅, hex U+2205.
Emoji Combos
emojicombos.com › symbol-unavailable
Symbol Unavailable Emojis & Text | 🚫✍️∅ | Copy & Paste
new zero symbol empty set nothingness symbol void symbol null symbol mathematical emptiness symbolic hole
UnicodePlus
unicodeplus.com › U+2205
"∅" U+2205: EMPTY SET (Unicode Character)
The unicode character U+2205 (∅) is named "EMPTY SET" and belongs to the Mathematical Operators block. It is HTML encoded as ∅.
Wikipedia
en.wikipedia.org › wiki › Empty_set
Empty set - Wikipedia
February 4, 2026 - U+2205 ∅ EMPTY SET. It can be coded in HTML as ∅ and as ∅ or as ∅. It can be coded in LaTeX as \varnothing. The symbol
Top answer 1 of 2
1
According to Wikipedia André Weil (and maybe others) introduced the symbol $\emptyset$ for the empty set. They were inspired by the letter Ø in the Norwegian and Danish alphabet. So, I guess you could argue that the symbol should be pronounced as it is pronounced in these alphabets.
In my experience most mathematicians just call the symbol "empty set".
Note also, that the Wikipedia article says that the symbol is not to be confused with the Greek letter $\phi$ or $\Phi$.
2 of 2
0
Although not mathematics, I thought I would add that in the APL programming language the empty vector is represented by the symbol ⍬, which is pronounced "zilde".