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ε (EN)
litera, symbol

litera “ε”

ε, epsilon
  1. piąta litera alfabetu greckiego (epsilon)
    In Greek writing, words like "ἐλπίς" (hope) begin with an ε.

symbol “ε”

ε
  1. (matematyka) dowolnie mała dodatnia liczba
    In calculus, we let ε be as small as needed to make the function values close to the limit.