U+212F was added to Unicode in version 1.1 (1993). It belongs to the block Letterlike Symbols in the Basic Multilingual Plane.

This character is a Lowercase Letter and is commonly used, that is, in no specific script. The character is also known as *error* and *natural exponent*.

The glyph is a Font composition of the glyphs . It has a Neutral East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. The glyph can, under circumstances, be confused with 29 other glyphs. In text U+212F behaves as Alphabetic regarding line breaks. It has type Lower for sentence and ALetter for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

The number

eis an important mathematical constant that is the base of the natural logarithm. It is approximately equal to 2.71828, and is the limit of (1 + 1/n)^{n}as n approaches infinity, an expression that arises in the study of compound interest. It can also be calculated as the sum of the infinite series

The constant can be defined in many ways. For example, e can be defined as the unique positive number a such that the graph of the function

y=a^{x}has unit slope atx= 0. The functionf(x) =e^{x}is called the exponential function, and its inverse is the natural logarithm, or logarithm to base e. The natural logarithm of a positive numberkcan also be defined directly as the area under the curvey= 1/xbetweenx= 1 andx=k, in which case, e is the number whose natural logarithm is 1. There are alternative characterizations.Sometimes called

Euler's numberafter the Swiss mathematician Leonhard Euler, e is not to be confused with γ—the Euler–Mascheroni constant, sometimes called simplyEuler's constant. The number e is also known asNapier's constant, but Euler's choice of the symbol e is said to have been retained in his honor. The constant was discovered by the Swiss mathematician Jacob Bernoulli while studying compound interest.The number e is of eminent importance in mathematics, alongside 0, 1, π and i. All five of these numbers play important and recurring roles across mathematics, and are the five constants appearing in one formulation of Euler's identity. Like the constant π, e is irrational: it is not a ratio of integers; and it is transcendental: it is not a root of

anynon-zero polynomial with rational coefficients. The numerical value of e truncated to 50 decimal places is

- 2.71828182845904523536028747135266249775724709369995... (sequence A001113 in OEIS).

System | Representation |
---|---|

Nº | 8495 |

UTF-8 | E2 84 AF |

UTF-16 | 21 2F |

UTF-32 | 00 00 21 2F |

URL-Quoted | %E2%84%AF |

HTML-Escape | ℯ |

Wrong windows-1252 Mojibake | â¯ |

HTML-Escape | ℯ |

alias | error |

alias | natural exponent |

L^{a}T_{e}X |
\mathscr{e} |

Property | Value |
---|---|

Age (age) | 1.1 |

Unicode Name (na) | SCRIPT SMALL E |

Unicode 1 Name (na1) | — |

Block (blk) | Letterlike_Symbols |

General Category (gc) | Lowercase Letter |

Script (sc) | Common |

Bidirectional Category (bc) | Left To Right |

Combining Class (ccc) | Not Reordered |

Decomposition Type (dt) | Font |

Decomposition Mapping (dm) | |

Lowercase (Lower) | ✔ |

Simple Lowercase Mapping (slc) | |

Lowercase Mapping (lc) | |

Uppercase (Upper) | ✘ |

Simple Uppercase Mapping (suc) | |

Uppercase Mapping (uc) | |

Simple Titlecase Mapping (stc) | |

Titlecase Mapping (tc) | |

Case Folding (cf) | |

ASCII Hex Digit (AHex) | ✘ |

Alphabetic (Alpha) | ✔ |

Bidi Control (Bidi_C) | ✘ |

Bidi Mirrored (Bidi_M) | ✘ |

Bidi Paired Bracket (bpb) | |

Bidi Paired Bracket Type (bpt) | None |

Cased (Cased) | ✔ |

Composition Exclusion (CE) | ✘ |

Case Ignorable (CI) | ✘ |

Full Composition Exclusion (Comp_Ex) | ✘ |

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) | ✘ |

Dash (Dash) | ✘ |

Deprecated (Dep) | ✘ |

Default Ignorable Code Point (DI) | ✘ |

Diacritic (Dia) | ✘ |

East Asian Width (ea) | Neutral |

Extender (Ext) | ✘ |

FC NFKC Closure (FC_NFKC) | |

Grapheme Cluster Break (GCB) | Any |

Grapheme Base (Gr_Base) | ✔ |

Grapheme Extend (Gr_Ext) | ✘ |

Grapheme Link (Gr_Link) | ✘ |

Hex Digit (Hex) | ✘ |

Hangul Syllable Type (hst) | Not Applicable |

Hyphen (Hyphen) | ✘ |

ID Continue (IDC) | ✔ |

Ideographic (Ideo) | ✘ |

ID Start (IDS) | ✔ |

IDS Binary Operator (IDSB) | ✘ |

IDS Trinary Operator and (IDST) | ✘ |

InMC (InMC) | — |

Indic Positional Category (InPC) | NA |

Indic Syllabic Category (InSC) | Other |

ISO 10646 Comment (isc) | — |

Joining Group (jg) | No_Joining_Group |

Join Control (Join_C) | ✘ |

Jamo Short Name (JSN) | — |

Joining Type (jt) | Non Joining |

Line Break (lb) | Alphabetic |

Logical Order Exception (LOE) | ✘ |

Math (Math) | ✔ |

Noncharacter Code Point (NChar) | ✘ |

NFC Quick Check (NFC_QC) | Yes |

NFD Quick Check (NFD_QC) | Yes |

NFKC Casefold (NFKC_CF) | |

NFKC Quick Check (NFKC_QC) | No |

NFKD Quick Check (NFKD_QC) | No |

Numeric Type (nt) | None |

Numeric Value (nv) | NaN |

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) | ✘ |

Pattern Syntax (Pat_Syn) | ✘ |

Pattern White Space (Pat_WS) | ✘ |

Quotation Mark (QMark) | ✘ |

Radical (Radical) | ✘ |

Sentence Break (SB) | Lower |

Simple Case Folding (scf) | |

Script Extension (scx) | Common |

Soft Dotted (SD) | ✘ |

STerm (STerm) | ✘ |

Terminal Punctuation (Term) | ✘ |

Unified Ideograph (UIdeo) | ✘ |

Variation Selector (VS) | ✘ |

Word Break (WB) | ALetter |

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) | ✘ |