Neperin luku

== Finnish == === Etymology === Neper from New Latin Neper, Latinized form of English Napier (after John Napier, Latinized Joannes Neper, the discoverer of logarithms, including the natural logarithm) === Pronunciation === IPA(key): /ˈne(ː)p(ː)erin ˈluku/, [ˈne̞(ː)p(ː)e̞rin ˈluku] === Proper noun === Neperin luku (mathematics) The mathematical constant e, Euler's number, base of the natural logarithm; approximately 2.71828. Alternative form: Napierin luku ==== Declension ====