seventeenth letter of the Greek alphabet

Rho (uppercase/lowercase Ρ ρ) is the 17th letter of the Greek alphabet. It is used to represent the "r" sound in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 100. Letters that came from it include the Roman R and Cyrillic Р.

In statistics, the lowercase Rho ("ρ") is used to represent population correlation.[1] In physics, the same letter is used to represent density.[2]

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  1. "Greek/Hebrew/Latin-based Symbols in Mathematics". Math Vault. 2020-03-20. Retrieved 2020-10-07.
  2. "Rho Symbol in Greek Alphabet". www.greeksymbols.net. Retrieved 2020-10-07.