Expansion symbols are often added above or below the ancient Greek letters, such as acute notes, stress, stress, tilde, partials, rough symbols, softening symbols, etc., so there are 26 different ways to write the vowel letter α in ancient Greek.
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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.