Double-Struck Capital N ℕ
Symbol Meaning
The set of natural numbers ℕ = {1, 2, 3, ...} consists of numbers used in counting. Sometimes, 0 is added to this set. Sets that have the same cardinality as ℕ (countable sets) are the “smallest” of infinite sets.
Sets ℕ , ℤ , ℚ , ℝ , and ℂ are often written in bold (for example, in the works of Nicolas Bourbaki), and on blackboards and manuscripts, they are written in double letters. American mathematicians introduced double font in printed texts, and it became popular with the famous 1965 textbook on complex analysis by Gunning and Rossi.
The symbol “Double-Struck Capital N” is included in the “Letterlike symbols” subblock of the “Letterlike Symbols” block and was approved as part of Unicode version 1.1 in 1993.
Synonyms
natural number.
| Unicode Name | Double-Struck Capital N |
| Unicode Number | |
| HTML Code | |
| CSS Code | |
| Entity | ℕ |
| Plane | 0: Basic Multilingual Plane |
| Unicode Block | Letterlike Symbols |
| Unicode Subblock | Letterlike symbols |
| Unicode Version | 1.1 (1993) |
| Type of paired mirror bracket (bidi) | None |
| Composition Exclusion | No |
| Case change | 2115 |
| Simple case change | 2115 |
| Math | + |
| Alphabetic | + |
| Uppercase | + |
| Cased | + |
| ID_Start | + |
| ID_Continue | + |
| XID_Start | + |
| XID_Continue | + |
| Grapheme_Base | + |
| scripts | Common |
| Other_Math | + |
| Encoding | hex | dec (bytes) | dec | binary |
|---|---|---|---|---|
| UTF-8 | E2 84 95 | 226 132 149 | 14845077 | 11100010 10000100 10010101 |
| UTF-16BE | 21 15 | 33 21 | 8469 | 00100001 00010101 |
| UTF-16LE | 15 21 | 21 33 | 5409 | 00010101 00100001 |
| UTF-32BE | 00 00 21 15 | 0 0 33 21 | 8469 | 00000000 00000000 00100001 00010101 |
| UTF-32LE | 15 21 00 00 | 21 33 0 0 | 354484224 | 00010101 00100001 00000000 00000000 |