Hilbert's twenty-first problem

Summary

Hilbert's twenty-first problem is a mathematical problem^[1]. It draws 5 Wikipedia views per month (mathematical_problem category, ranking #80 of 128).^[2]

Key Facts

• Hilbert's twenty-first problem's instance of is recorded as mathematical problem^[3].
• David Hilbert is named after Hilbert's twenty-first problem^[4].
• Hilbert's twenty-first problem's GND ID is recorded as 4372594-6^[5].
• Hilbert's twenty-first problem's part of is recorded as Hilbert's problems^[6].
• Hilbert's twenty-first problem's Freebase ID is recorded as /m/069h2y^[7].
• Hilbert's twenty-first problem's solved by is recorded as Andrei Bolibrukh^[8].
• Hilbert's twenty-first problem's different from is recorded as Riemann–Hilbert problems^[9].
• Hilbert's twenty-first problem's nLab ID is recorded as Riemann-Hilbert problem^[10].
• Hilbert's twenty-first problem's Microsoft Academic ID is recorded as 2779626350^[11].

Why It Matters

Hilbert's twenty-first problem draws 5 Wikipedia views per month (mathematical_problem category, ranking #80 of 128).^[2] It has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.^[12] It is known by 5 alternative names across languages and contexts.^[13]