1. There are many famous paradoxes in mathematics, such as Galileo's Paradox, Becquerel's Paradox, Cantor's Maximum Cardinal Paradox, Blary's Forty Maximum Ordinal Paradox, Richard's Paradox, Set Theory Paradox and hippasus's Paradox.

2. Richard Paradox: It is a paradox published in 1905 by Richard, a teacher in Dijon Middle School, France, to illustrate the importance of carefully distinguishing mathematics from metamathematics. Becquerel paradox: In the history of mathematics, the Becquerel problem is called "Becquerel paradox" and can be expressed as "whether infinitesimal is zero". Paradox of set theory: the paradox put forward by British mathematician Russell in 1902.