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1)

Π

Π
Meaning
    1. ①
      pi (Greek letter)
    2. ②
      mathematics
      pi (constant)
      Only applies to π
    3. ③
      mathematics
      pi (product notation)
      Only applies to Π
Forms
2)

Π

Meaning
    1. EN Pi (/ˈpaɪ/; Greek: [pi], uppercase Π, lowercase π) is the sixteenth letter of the Greek alphabet, representing [p].
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