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The format is the same as for any entity reference: &name; where name is the case-sensitive name of the entity. The semicolon is required. Because numbers are harder for humans to remember than names, character entity references are most often written by humans, while numeric character references are most often produced by computer programs. [1]
The Unicode Standard encodes almost all standard characters used in mathematics. [1] Unicode Technical Report #25 provides comprehensive information about the character repertoire, their properties, and guidelines for implementation. [1]
The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;
Grouped by their numerical property as used in a text, Unicode has four values for Numeric Type. First there is the "not a number" type. Then there are decimal-radix numbers, commonly used in Western style decimals (plain 0–9), there are numbers that are not part of a decimal system such as Roman numbers, and decimal numbers in typographic context, such as encircled numbers.
Number Forms is a Unicode block containing Unicode compatibility characters that have specific meaning as numbers, but are constructed from other characters. They consist primarily of vulgar fractions and Roman numerals .
BATAK SYMBOL BINDU PINARBORAS U+1BFD: Po, other Batak ᯾ BATAK SYMBOL BINDU JUDUL U+1BFE: Po, other Batak ᯿ BATAK SYMBOL BINDU PANGOLAT U+1BFF: Po, other Batak ৽ BENGALI ABBREVIATION SIGN U+09FD: Po, other Bengali ᱁ BHAIKSUKI DANDA U+11C41: Po, other Bhaiksuki ᱂ BHAIKSUKI DOUBLE DANDA U+11C42: Po, other Bhaiksuki ᱃ BHAIKSUKI WORD ...
Although the symbols that correspond to named entities are very likely to be displayed correctly, a significant number of viewers will have problems seeing all the characters listed at Mathematical operators and symbols in Unicode. One way to guarantee that an uncommon symbol is rendered correctly for all readers is to force the symbol to ...
Such a number is algebraic and can be expressed as the sum of a rational number and the square root of a rational number. Constructible number: A number representing a length that can be constructed using a compass and straightedge. Constructible numbers form a subfield of the field of algebraic numbers, and include the quadratic surds.