History of 13.2.20

Revisions on June 14, 2026

• Edit to “(1) Finding the boundary points A and B”

  Adler Jun 14, 2026, 3:24 PM
  +1 −1 #18769
• Edits to “Problem 13.2.20”, “Solution”, “(1) Finding the boundary points A and B”

  Adler Jun 14, 2026, 2:04 PM
  +63 −5 #18764
• New solutionnew solution

  Adler Jun 14, 2026, 1:57 PM
  +13 −0 #18763