File:Alpha_uc_lc.svg · Wikimedia Commons · See Wikimedia Commons
Alpha is the first letter of the Greek alphabet, with a numerical value of one in ancient Greek number systems. It matters because it's a foundational letter whose origins trace back to the Phoenician alphabet and from which other writing systems, including Latin and Cyrillic, ultimately derived their own first letters.
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- Followed by
- beta
- Based on
- 𐤀
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- Greek letter alpha serif+sans.svg
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Article · 中文
Alpha(Άλφα;大寫Α,小寫α,中文音译:阿尔法、阿法、阿拉法),是第1個希臘字母。 小寫α用於物理學上: * 角加速度 * Alpha粒子和相關的Alpha衰變 * 精細結構常數 小寫α用於數學上: * α(m,n):阿克曼反函數,一個輸出值增長速度非常低的函數。 「Alpha」常用作形容詞,以顯示某件事物中最重要或最初的,例如軟體工程中的Alpha版本。 西里爾字母的 А 和拉丁字母的 A 都是從 Alpha 變來。 Alpha指事情的開始,對應指終結的Omega。例如聖經啟示錄22:13:「我是阿爾法、我是奧米伽、我是首先的、我是末後的、我是初、我是終。」
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