ε is the fifth letter of Greek letters, capital ε, lowercase ε, and e of Latin letters is changed from ε. It can also refer to a phonetic symbol used in American English, that is, the e sound of bed. It is also the minimum energy value ε (called energy quantum) in the energy quantization hypothesis of German physicist Planck.
Extended data
ε is a Greek letter, derived from Phoenician letters. Phoenician letters have only consonants and are written from right to left. The vowels in the Greek language are developed, and the Greeks have added vowels. Because the Greek writing tool was a wax board, sometimes the first line was written from right to left, and the last line was written from left to right, which became the so-called "cultivated land" writing, and then gradually evolved into all writing from left to right.
The direction of the letters is also reversed. The Romans introduced the Greek alphabet, changed it into Latin alphabet with a little change, and it became popular all over the world. Greek letters are widely used in academic fields, such as mathematics. Cyrillic letters also evolved from Greek letters.
The English word alphabet (letter) comes from the alphabetum in vulgar Latin, and the alphabetum comes from the Greek word α λ φ α β ο ν (transliteration of Beton), which is the synthesis of the first two Greek letters α(Alpha) and β(Beta).
Greek letters have a far-reaching influence on Greek civilization and even western culture. In the New Testament, God said, "I am Alpha, I am Omega, I am the first, I am the last, I am the beginning and I am the end." (Revelation 22: 13).
In the Greek alphabet, the first letter is "α, α", indicating the beginning, and the last letter is "ω, ω" ω, indicating the end. This is the trace of the New Testament written in Greek.
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