Phrase guide
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noun
A modification of the harmonic series, formed by omitting all terms whose denominator expressed in base 10 contains the digit 9.
Definition source: English Wiktionary via Wiktextract
Topics: mathematics, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
The series was first studied by Aubrey J. Kempner in 1914.
