decodeunicode.org . decode . OHM SIGN

EDIT The Ohm Sign is the capital Greek Omega. In electrotechnics, it is the sign for the electrical resistance (the ratio of voltage to current). The Omega is the 24th and final character of the Greek Alphabet. In conjunction with the letter Alpha it is often used to symbolize the beginning and the end.
jsw

EDIT Unicode logic demands the existance of a separate codepoint for the mathematical character Ohm (U+2126) and the Greek Capital Letter Omega (U+03A4) although they are the same character.
jsw

EDIT Type Design The mathematical character Ohm (U+2126) and the Greek Capital Letter Omega (U+03A4) are the same character, but they can have different glyphs if so desired. The Adobe fonts for example use two glyphs. In every case it is important that the type designer positions a glyph at both codepoints.
jsw

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U+03A9
GREEK CAPITAL LETTER OMEGA

U+03C9
GREEK SMALL LETTER OMEGA


01	CODE POINT VALUE: : : : :	2126
02	NAME (UNICODE NAME) : : :	OHM SIGN
03	GENERAL CATEGORY: : : : :	Letter, Uppercase
04	COMBINING CLASS : : : : :	Spacing, split, enclosing, reordrant, and Tibetan subjoined
05	BIDIRECTIONAL CATEGORY: :	Left-to-Right
06	DECOMPOSITION MAPPING : :	03A9
07	DECIMAL DIGIT VALUE : : :	-
08	DIGIT VALUE : : : : : : :	-
09	NUMERIC VALUE : : : : : :	-
10	MIRRORED: : : : : : : : :	No
11	UNICODE 1.0 NAME: : : : :	OHM SIGN
12	ISO 10646 COMMENT FIELD :	-


13	UPPERCASE MAPPING : : : :	-
14	LOWERCASE MAPPING : : : :	U+03C9
15	TITLECASE MAPPING : : : :	-
16	DECIMAL VALUE : : : : : :	8486
17	UTF-8 HEX VALUE : : : : :	0xE284A6
18	UTF-16 HEX VALUE: : : : :	0x2126
19	UTF-32 HEX VALUE: : : : :	0x00002126
20	XHTML : : : : : : : : : :	&#8486
21	BLOCK : : : : : : : : : :	Letterlike Symbols
22	PLANE : : : : : : : : : :	Supplementary Ideographic Plane (SIP)
23	STROKE NUMBER : : : : : :	-
24	RADICAL : : : : : : : : :	-

U+2126 OHM SIGN

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