Write a simpler version for the sentence: Hilbert's tenth problem is a problem in mathematics that is named after David Hilbert who included it in Hilbert's problems as a very important problem in mathematics. <SEP> As with all problems included in Hilbert's problems, it was unresolved and considered very difficult when the famous list was published in 1900.
Hilbert's tenth problem is the tenth on the list of mathematical problems that the German mathematician David Hilbert posed in 1900.