ζ (EN)

letter, symbol

letter “ζ”

1. the sixth letter of the Greek alphabet
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   In learning Greek, she practiced writing the letter ζ in her notebook.

symbol “ζ”

1. (in mathematics) a symbol used to represent certain mathematical functions or variables, such as the Riemann zeta function
   The researchers studied the properties of the function ζ (s) to understand prime numbers better.
2. (in physics) a symbol representing the damping ratio in engineering and physics
   To predict how the structure would respond to vibrations, they calculated the damping ratio ζ.