U+2A33 Smash Product
U+2A33 was added in Unicode version 3.2 in 2002. 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 no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2A33 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
In topology, a branch of mathematics, the smash product of two pointed spaces (i.e. topological spaces with distinguished basepoints) (X, x0) and (Y, y0) is the quotient of the product space X × Y under the identifications (x, y0) ~ (x0, y) for all x in X and y in Y. The smash product is itself a pointed space, with basepoint being the equivalence class of (x0, y0). The smash product is usually denoted X ∧ Y or X ⨳ Y. The smash product depends on the choice of basepoints (unless both X and Y are homogeneous).
One can think of X and Y as sitting inside X × Y as the subspaces X × {y0} and {x0} × Y. These subspaces intersect at a single point: (x0, y0), the basepoint of X × Y. So the union of these subspaces can be identified with the wedge sum . In particular, {x0} × Y in X × Y is identified with Y in , ditto for X × {y0} and X. In , subspaces X and Y intersect in the single point . The smash product is then the quotient
The smash product shows up in homotopy theory, a branch of algebraic topology. In homotopy theory, one often works with a different category of spaces than the category of all topological spaces. In some of these categories the definition of the smash product must be modified slightly. For example, the smash product of two CW complexes is a CW complex if one uses the product of CW complexes in the definition rather than the product topology. Similar modifications are necessary in other categories.
Representations
System | Representation |
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Nº | 10803 |
UTF-8 | E2 A8 B3 |
UTF-16 | 2A 33 |
UTF-32 | 00 00 2A 33 |
URL-Quoted | %E2%A8%B3 |
HTML hex reference | ⨳ |
Wrong windows-1252 Mojibake | ⨳ |
HTML named entity | ⨳ |
Elsewhere
Complete Record
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3.2 (2002) | |
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