Home U+2200 to U+22FF Mathematical Operators
Glyph for U+222F
Source: Noto Sans Math

U+222F Surface Integral

U+222F was added in Unicode version 1.1 in 1993. It belongs to the block U+2200 to U+22FF Mathematical Operators in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Math Symbol and is commonly used, that is, in no specific script.

The glyph is a compatibility composition of the glyphs Glyph for U+222E Contour Integral, Glyph for U+222E Contour Integral. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is mirrored. The word that U+222F forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.

The Wikipedia has the following information about this codepoint:

In mathematics, particularly multivariable calculus, a surface integral is a generalization of multiple integrals to integration over surfaces. It can be thought of as the double integral analogue of the line integral. Given a surface, one may integrate over this surface a scalar field (that is, a function of position which returns a scalar as a value), or a vector field (that is, a function which returns a vector as value). If a region R is not flat, then it is called a surface as shown in the illustration.

Surface integrals have applications in physics, particularly with the theories of classical electromagnetism.

Representations

System Representation (click value to copy)
Nº 8751
UTF-8 E2 88 AF
UTF-16 22 2F
UTF-32 00 00 22 2F
URL-Quoted %E2%88%AF
HTML hex reference ∯
Wrong windows-1252 Mojibake ∯
HTML named entity ∯
HTML named entity ∯
Encoding: GB18030 (hex bytes) 81 36 D4 36
LATEX \surfintegral
RFC 5137 \u'222F'
Bash and Zsh inside echo -e\u222F
C and C++ \u222F
C# \u222F
CSS \00222F
Excel =UNICHAR(8751)
Go \u222F
JavaScript \u222F
Modern JavaScript since ES6\u{222f}
JSON \u222F
Java \u222F
Lua \u{222F}
Matlab char(8751)
Perl "\x{222F}"
PHP \u{222f}
PostgreSQL U&'\222F'
PowerShell `u{222F}
Python \u222F
Ruby \u{222f}
Rust \u{222f}
Click the star button next to each label to set this representation as favorite or remove it from the favorites. Favorites will be shown initially. (Favorites are stored locally on your computer and never sent over the internet.)

Related Characters

Confusables

Elsewhere

Complete Record

Property Value
Age (age) 1.1 (1993)
Unicode Name (na) SURFACE INTEGRAL
Unicode 1 Name (na1) —
Block (blk) Mathematical Operators
General Category (gc) Math Symbol
Script (sc) Common
Bidirectional Category (bc) Other Neutral
Combining Class (ccc) Not Reordered
Decomposition Type (dt) compatibility
Decomposition Mapping (dm) Glyph for U+222E Contour Integral Glyph for U+222E Contour Integral
Lowercase (Lower) ✘
Simple Lowercase Mapping (slc) Glyph for U+222F Surface Integral
Lowercase Mapping (lc) Glyph for U+222F Surface Integral
Uppercase (Upper) ✘
Simple Uppercase Mapping (suc) Glyph for U+222F Surface Integral
Uppercase Mapping (uc) Glyph for U+222F Surface Integral
Simple Titlecase Mapping (stc) Glyph for U+222F Surface Integral
Titlecase Mapping (tc) Glyph for U+222F Surface Integral
Case Folding (cf) Glyph for U+222F Surface Integral
ASCII Hex Digit (AHex) ✘
Alphabetic (Alpha) ✘
Bidi Control (Bidi_C) ✘
Bidi Mirrored (Bidi_M) ✔
Composition Exclusion (CE) ✘
Case Ignorable (CI) ✘
Changes When Casefolded (CWCF) ✘
Changes When Casemapped (CWCM) ✘
Changes When NFKC Casefolded (CWKCF) ✔
Changes When Lowercased (CWL) ✘
Changes When Titlecased (CWT) ✘
Changes When Uppercased (CWU) ✘
Cased (Cased) ✘
Full Composition Exclusion (Comp_Ex) ✘
Default Ignorable Code Point (DI) ✘
Dash (Dash) ✘
Deprecated (Dep) ✘
Diacritic (Dia) ✘
Emoji Modifier Base (EBase) ✘
Emoji Component (EComp) ✘
Emoji Modifier (EMod) ✘
Emoji Presentation (EPres) ✘
Emoji (Emoji) ✘
Extender (Ext) ✘
Extended Pictographic (ExtPict) ✘
FC NFKC Closure (FC_NFKC) Glyph for U+222F Surface Integral
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base) ✔
Grapheme Extend (Gr_Ext) ✘
Grapheme Link (Gr_Link) ✘
Hex Digit (Hex) ✘
Hyphen (Hyphen) ✘
ID Continue (IDC) ✘
ID Start (IDS) ✘
IDS Binary Operator (IDSB) ✘
IDS Trinary Operator and (IDST) ✘
IDSU (IDSU) 0
ID_Compat_Math_Continue (ID_Compat_Math_Continue) 0
ID_Compat_Math_Start (ID_Compat_Math_Start) 0
Ideographic (Ideo) ✘
InCB (InCB) None
Indic Mantra Category (InMC) —
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN) —
Join Control (Join_C) ✘
Logical Order Exception (LOE) ✘
Modifier Combining Mark (MCM) ✘
Math (Math) ✔
Noncharacter Code Point (NChar) ✘
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) Glyph for U+222E Contour Integral Glyph for U+222E Contour Integral
NFKC Quick Check (NFKC_QC) No
NFKC_SCF (NFKC_SCF) Glyph for U+222E Contour Integral Glyph for U+222E Contour Integral
NFKD Quick Check (NFKD_QC) No
Other Alphabetic (OAlpha) ✘
Other Default Ignorable Code Point (ODI) ✘
Other Grapheme Extend (OGr_Ext) ✘
Other ID Continue (OIDC) ✘
Other ID Start (OIDS) ✘
Other Lowercase (OLower) ✘
Other Math (OMath) ✘
Other Uppercase (OUpper) ✘
Prepended Concatenation Mark (PCM) ✘
Pattern Syntax (Pat_Syn) ✔
Pattern White Space (Pat_WS) ✘
Quotation Mark (QMark) ✘
Regional Indicator (RI) ✘
Radical (Radical) ✘
Sentence Break (SB) Other
Soft Dotted (SD) ✘
Sentence Terminal (STerm) ✘
Terminal Punctuation (Term) ✘
Unified Ideograph (UIdeo) ✘
Variation Selector (VS) ✘
Word Break (WB) Other
White Space (WSpace) ✘
XID Continue (XIDC) ✘
XID Start (XIDS) ✘
Expands On NFC (XO_NFC) ✘
Expands On NFD (XO_NFD) ✘
Expands On NFKC (XO_NFKC) ✔
Expands On NFKD (XO_NFKD) ✔
Bidi Paired Bracket (bpb) Glyph for U+222F Surface Integral
Bidi Paired Bracket Type (bpt) None
East Asian Width (ea) neutral
Hangul Syllable Type (hst) Not Applicable
ISO 10646 Comment (isc) —
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
Numeric Type (nt) none
Numeric Value (nv) not a number
Simple Case Folding (scf) Glyph for U+222F Surface Integral
Script Extension (scx)
Vertical Orientation (vo) R