symbol denoting the empty set
Factsheet
Unicode character ∅
Unicode character ∅
Wikipedia
en.wikipedia.org › wiki › Null_sign
Null sign - Wikipedia
June 13, 2025 - The null sign (∅) is a symbol often used in mathematics for denoting the empty set. The same letter in linguistics represents zero, the lack of an element. It is commonly used in phonology, morphology, and syntax. The symbol ∅ is available at Unicode point U+2205.
Wumbo
wumbo.net › symbols › empty-set
Empty Set Symbol (∅)
The 0 (zero) symbol is used in math to represent the number zero or nothing. ... An empty set, also called the null set, is respresented as a zero with a diagonal line through it or as an empty pair of curly braces.
How can I type the null sign?
How can I type the null sign, the symbol looking like a zero with a slash through it. More on learn.microsoft.com
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June 20, 2020notation - What is the mathematical symbol for "nothing"? - Mathematics Stack Exchange
I want to define a random variable $X$ which takes the values from the set $\{0,1\}$. The probability of $X = 0$ is 0.4 and the probability of $X = 1$ is also 0.4. I want $X$ to take a null value with the remaining probability of $0.2$. The question is, what should be the right symbol to denote ... More on math.stackexchange.com
What letter is the empty set symbol ∅ to you?
Those are all distinct symbols, as you can see here: Greek Phi — capital: Φ, lowercase: φ/ϕ "slashed O" — capital: Ø, lowercase: ⊘ Empty set: ∅ More on reddit.com
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May 29, 2024Do ∅ and Φ both mean null set in set theory?
Generally speaking, the first is the empty set and the second is phi, whatever that means in context. Often, when typesetting functionality is limited, phi is used to refer to the empty set — since using the conventional symbol might be very difficult or impossible. More on reddit.com
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April 22, 2023Wikipedia
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 ...
Piliapp
piliapp.com › symbols › null-sign
∅ Null Sign
Philosophical Implications: The ... Unlike the Union Symbol (∪) and Intersection Symbol (∩), which combine sets, the Null Sign (∅) indicates the absence of elements....
Top answer 1 of 2
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Another suggestion is you can also type: Alt + 0216.
Best regards,
Dan
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Hi! I'm Dan! An Independent Advisor and also a Microsoft user for several years. I'll be more than happy to assist you today!
Method 1:
The ∅ symbol can be entered by going into "Symbols", choose "Mathematical Characters" and from the dropdown "Subset".
Method 2:
Type 2205 and then press "Alt + X".
I hope this information is helpful. Please keep me updated on the status of this issue. If you have any more questions, feel free to ask and I will be glad to assist you.
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Best regards,
Dan
Top answer 1 of 3
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This is sufficiently rare, and handled in sufficiently many different ways, that you should always state explicitly how you're treating it. In my experience, the most common symbols are:
, 
, 
or similar on the more computer-sciencey side, and
or 
on the more logicy side.- Note that "
" is also used to denote contradiction, and "
" is also used as a predicate to denote "is undefined" or "doesn't halt" with "
" denoting "is defined"/"does halt."
- Note that "
But again, I'd explicitly state which you're using - although admittedly multiple of these would almost certainly make it obvious from context.
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You can use some kind of Many-valued logic, but you said you want to put it simply. In SQL there is 3-valued logic with "null"/"unknown", for example.
Shutterstock
shutterstock.com › search › null-symbol
7,322 Null Symbol Images, Stock Photos, 3D objects, & Vectors | Shutterstock
Find Null Symbol stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. Thousands of new, high-quality pictures added every day.
Unicode Compart
compart.com › en › unicode › U+2400
“␀” U+2400 Symbol For Null Unicode Character
U+2400 is the unicode hex value of the character Symbol For Null. Char U+2400, Encodings, HTML Entitys:␀,␀, UTF-8 (hex), UTF-16 (hex), UTF-32 (hex)
Flaticon
flaticon.com › free-icons › null
Null Icons & Symbols
1 week ago - 284 null icons. Vector icons in SVG, PSD, PNG, EPS and ICON FONT
Teflpedia
teflpedia.com › Null_symbol
Null symbol - Teflpedia
The null sign or null symbol is a symbol used in the field of linguistics to denote zero (linguistics), an empty set.
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?
May 29, 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.
BYJUS
byjus.com › maths › empty-set
Empty Set Definition
As we know, the outcomes of rolling a die are 1, 2, 3, 4, 5, and 6. Thus, the set with numbers greater than 6 here will be { }. That means there will be no elements and is called the empty set.
Published May 18, 2022 Views 31K
Pinterest
pinterest.com › explore › home decor
What Is the Null Symbol in Mathematics?
September 15, 2024 - In mathematics, the null symbol is used to represent the empty set.
Cuemath
cuemath.com › algebra › empty-set
Empty Set - Definitions, Properties, Examples | Null Set
A set that does not contain any element is called an empty set or a null set. An empty set is denoted using the symbol '∅'. It is read as 'phi'. Example: Set X = {}. It is also called a void set or null set.
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.
Grokipedia
grokipedia.com › page › Null_symbol
Null symbol
November 26, 2025 - The null symbol, denoted as ∅, is a mathematical notation primarily used in set theory to represent the empty set, which is the unique set containing no elements and having a cardinality of zero.[1] This symbol distinguishes the empty set ...
Quora
quora.com › What-is-the-name-of-the-symbol-Which-we-use-for-empty-set-in-mathematics
What is the name of the symbol ∅ ? Which we use for empty set in mathematics. - Quora
Answer (1 of 3): It's just called the empty set. It's LaTeX code is \emptyset (\emptyset) or \varnothing (\varnothing), which is just a typographical variation that many people prefer aesthetically.
Adobe Stock
stock.adobe.com › search
Null Symbol Images – Browse 23,509 Stock Photos, Vectors, and Video | Adobe Stock
3 weeks ago - Search from thousands of royalty-free Null Symbol stock images and video for your next project. Download royalty-free stock photos, vectors, HD footage and more on Adobe Stock.
SYMBL
symbl.cc › homepage › unicode › blocks › basic latin › c0 controls › null
Null symbol meaning, copy and paste unicode character - (◕‿◕) SYMBL
January 29, 2025 - It's the first symbol in Unicode and ASCII taking the zeroth position. Null is used in various ways, such as indicating the end of lines or data blocks, filling space between data elements, preventing the processing of data after a certain stage, etc.
Symbol Wiki
symbol-thing.fandom.com › wiki › Null
Null | Symbol Wiki | Fandom
Null is literally nothing. Its hexadecimal code is U+0000. There is no use currently known for the symbol. Nul This symbol is the first ever unicode.