0x03B5

0x03B5 is the Unicode code point U+03B5, corresponding to the Greek small letter epsilon (ε). It is the lowercase form of epsilon, the fifth letter of the Greek alphabet, and is used in Greek orthography as well as as a symbol in mathematics and science.

In Unicode, U+03B5 resides in the Greek and Coptic block. Its general category is Ll (letter, lowercase) and its script is Greek. In the system of Greek numerals, epsilon represents the number 5. The character is typically rendered in fonts as ε, and its UTF-8 encoding is the two-byte sequence 0xCE 0xB5. In HTML, it can be represented by the numeric reference ε or the named entity ε.

Usage and symbolism: In modern Greek, this character represents the e sound in the Greek alphabet. In mathematics and related fields, epsilon is widely used to denote a small positive quantity in limit definitions (epsilon-delta) and as a symbol for error terms, tolerance, or permittivity in physics. It is common to encounter epsilon and its variants in formulas and discussions of approximation, convergence, and physical constants.

Related symbols and references: A visually similar character exists as the Greek lunate epsilon, U+03F5 (ϵ), which is distinct from U+03B5 and has its own mathematical usages. The uppercase counterpart is Epsilon, U+0395 (Ε). In typography and encoding, note the distinction between U+03B5 (ε) and U+03F5 (ϵ) to avoid confusion in mathematical notation and font rendering.