Alpha, beta, gamma and delta are all Greek letters. Greek alphabet is a letter used in Greek, and it is also widely used in mathematics, physics, biology, chemistry, astronomy and other disciplines. Greek letters are similar to English letters and Russian letters, but with different symbols and the same phonetic attributes.

Greek alphabet (English: Greek alphabet, Greek: ε λ λ ν ι κ? αλφ? β η ο) is a letter used in Greek, and it is also widely used in mathematics, physics, biology, chemistry, astronomy and other disciplines. Greek alphabet, similar to Latin alphabet and Cyrillic alphabet, is a complete phonemic text. Greek alphabet is the earliest writing system in the world in which letters represent vowels and phonemes.

Cyrillic alphabet and Georgian alphabet used in Russian, Ukrainian, etc. Are all developed from the Greek alphabet. Some Greek words related to Greek letters have entered many languages. For example, the word Delta comes from the Greek letter δ, because the shape of δ is a triangle.

The Greek alphabet is used in mathematics, science, engineering and other fields. In mathematics, Greek letters are usually used to represent constants, special functions and some specific variables. In the field of mathematics, the meanings of uppercase and lowercase Greek letters are usually different and irrelevant.

Some capitalized Greek letters are the same or very similar to the corresponding Latin letters, so they are not used, such as: A, B, E, Z, H, I, K, M, N, O, P, T, Y, X. In addition, lowercase ι(iota), ο(omicron) and μ (up Sometimes, font variants of Greek letters have specific meanings in mathematics, such as φ(phi) and π(pi).

In financial mathematics, Greek letters are variables used to represent investment risks. Mathematicians whose mother tongue is English don't read Greek letters with modern or ancient pronunciations, but read traditional English pronunciations. For example, the letter θ, these mathematicians will read it as [? θeit？ ]。 (In ancient times: [th^ε? Ta], nowadays: [? θita ]).