What is the Greek letter for the letter 'Y'?

The Greek letter for 'Y' is Upsilon. In the Greek alphabet, Upsilon is represented as Υ in uppercase and υ in lowercase, phonetically resembling the English sound of 'U' and sometimes 'Y' depending on its usage in words. This letter has been incorporated into various fields, including mathematics and science, often denoting specific variables or concepts. Understanding the Greek alphabet is essential for recognizing terminology and symbols frequently used in academic contexts, especially in fraternities and sororities, where Greek letter representation is a foundational aspect of identity and heritage.