Category:未解決問題
哲学上の未解決問題
List of philosophical problems
Template:未解決問題
Template:Unsolved problems情報理論上の未解決問題
List of unsolved problems in information theory
経済学上の未解決問題
List of unsolved problems in economics
統計学上の未解決問題
List of unsolved problems in statistics
パトムスキー・クレーター
Patomskiy crater
医学上の未解決問題
Unsolved problems in medicine
天文学上の未解決問題
List of unsolved problems in astronomy
地球科学上の未解決問題
List of unsolved problems in geoscience
懸賞金問題
Inducement prize contest未解決問題
Lists of unsolved problems