U+2294 Square Cup
U+2294 was added to Unicode in version 1.1 (1993). It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. The glyph can, under circumstances, be confused with 1 other glyphs. In text U+2294 behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
The Wikipedia has the following information about this codepoint:
In mathematics, a disjoint union (or discriminated union) of a family of sets ( A i : i ∈ I ) {displaystyle (A_{i}:iin I)} is a set A , {displaystyle A,} often denoted by ⨆ i ∈ I A i , { extstyle igsqcup _{iin I}A_{i},} with an injection of each A i {displaystyle A_{i}} into A , {displaystyle A,} such that the images of these injections form a partition of A {displaystyle A} (that is, each element of A {displaystyle A} belongs to exactly one of these images). A disjoint union of a family of pairwise disjoint sets is their union.
In category theory, the disjoint union is the coproduct of the category of sets, and thus defined up to a bijection. In this context, the notation ∐ i ∈ I A i { extstyle coprod _{iin I}A_{i}} is often used.
The disjoint union of two sets A {displaystyle A} and B {displaystyle B} is written with infix notation as A ⊔ B {displaystyle Asqcup B} . Some authors use the alternative notation A ⊎ B {displaystyle Auplus B} or A ∪ ⋅ B {displaystyle Aoperatorname {{cup }!!!{cdot },} B} (along with the corresponding ⨄ i ∈ I A i { extstyle iguplus _{iin I}A_{i}} or ⋃ ⋅ i ∈ I A i { extstyle operatorname {{igcup }!!!{cdot },} _{iin I}A_{i}} ).
A standard way for building the disjoint union is to define A {displaystyle A} as the set of ordered pairs ( x , i ) {displaystyle (x,i)} such that x ∈ A i , {displaystyle xin A_{i},} and the injection A i → A {displaystyle A_{i} o A} as x ↦ ( x , i ) . {displaystyle xmapsto (x,i).}
Representations
System | Representation |
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Nº | 8852 |
UTF-8 | E2 8A 94 |
UTF-16 | 22 94 |
UTF-32 | 00 00 22 94 |
URL-Quoted | %E2%8A%94 |
HTML hex reference | ⊔ |
Wrong windows-1252 Mojibake | ⊔ |
HTML named entity | ⊔ |
HTML named entity | ⊔ |
LATEX | \sqcup |
Related Characters
Confusables
Elsewhere
Complete Record
Property | Value |
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1.1 (1993) | |
SQUARE CUP | |
— | |
Mathematical Operators | |
Math Symbol | |
Common | |
Other Neutral | |
Not Reordered | |
None | |
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✘ | |
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✘ | |
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✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
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✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
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Any | |
✔ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
0 | |
0 | |
0 | |
✘ | |
None | |
— | |
NA | |
Other | |
— | |
✘ | |
✘ | |
✔ | |
✘ | |
Yes | |
Yes | |
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Yes | |
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Yes | |
✘ | |
✘ | |
✘ | |
✘ | |
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✘ | |
✘ | |
✘ | |
✘ | |
✔ | |
✘ | |
✘ | |
✘ | |
✘ | |
Other | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
Other | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
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None | |
Neutral | |
Not Applicable | |
— | |
No_Joining_Group | |
Non Joining | |
Alphabetic | |
None | |
not a number | |
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R |