- Joe Biden (Wikiquote)
Joseph Robinette “Joe” Biden, Jr. (born November 20, 1942) is an American politician who was the 46th president of the United States from 2021 to 2025. A member of the Democratic Party, he served as the 47th vice president from 2009 to 2017 under President Barack Obama, and represented Delaware in the U.S. Senate from 1973 to 2009.
- Riemann hypothesis (Wikipedia)
In mathematics, the Riemann hypothesis is the conjecture that the Riemann zeta function has its zeros only at the negative even integers and complex numbers with real part 1/2. Many consider it to be the most important unsolved problem in pure mathematics. It is of great interest in number theory because it implies results about the distribution of prime numbers. It was proposed by Bernhard Riemann (1859), after whom it is named.