“ε” U+03B5: Greek Small Letter Epsilon

ℹ️ About

The Greek Small Letter Epsilon (ε) is a fundamental glyph in the Greek alphabet. In calculus and mathematical analysis, it is the standard notation for an arbitrarily small positive quantity (the “epsilon-delta” definition of limits). In electromagnetism, it represents permittivity. This Unicode character is distinct from the Lunate Epsilon symbol (ϵ), which is often preferred in specific mathematical contexts to avoid confusion with set membership symbols.

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