li's criterion
Word Rarity
Rare
Frequency: Zipf frequency 2.53 in modern English
14
Scrabble Score
12
Letters
4
Syllables
9
Unique Chars
Meaning
name
A particular statement about the positivity of a certain sequence that is equivalent to the Riemann hypothesis.
Etymology
Named after Xian-Jin Li, who presented it in 1997.