Editing Hilbert's problems (section)

== The 24th problem ==
{{Main article|Hilbert's twenty-fourth problem}}

Hilbert originally included 24 problems on his list, but decided against including one of them in the published list. The "24th problem" (in [[proof theory]], on a criterion for [[simplicity]] and general methods) was rediscovered in Hilbert's original manuscript notes by German historian [[Rüdiger Thiele]] in 2000.<ref name="Thiele">{{cite journal |last=Thiele |first=Rüdiger |date=January 2003 |title=Hilbert's twenty-fourth problem |url=http://www.maa.org/news/Thiele.pdf |journal=American Mathematical Monthly |volume=110 |pages=1–24 |doi=10.1080/00029890.2003.11919933 |s2cid=123061382}}</ref>