User contributions
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- 11:57, 30 January 2021 (diff | hist) . . (+54) . . 1989 IMO Problems/Problem 4 (current)
- 11:56, 30 January 2021 (diff | hist) . . (+11) . . 1989 IMO Problems/Problem 3 (current)
- 11:55, 30 January 2021 (diff | hist) . . (+3,052) . . 1989 IMO Problems/Problem 3
- 11:50, 30 January 2021 (diff | hist) . . (+97) . . 1989 IMO Problems/Problem 2 (current)
- 11:47, 30 January 2021 (diff | hist) . . (+2,959) . . N 1989 IMO Problems (Created page with "Problems of the 1989 IMO. ==Day I== ===Problem 1=== Prove that in the set <math> \{1,2, \ldots, 1989\}</math> can be expressed as the disjoint union of subsets <math> A_i...") (current)
- 11:39, 30 January 2021 (diff | hist) . . (+11) . . 1988 IMO Problems
- 11:38, 30 January 2021 (diff | hist) . . (+51) . . 1988 IMO Problems/Problem 5 (current)
- 11:38, 30 January 2021 (diff | hist) . . (+3,071) . . 1988 IMO Problems/Problem 5
- 11:36, 30 January 2021 (diff | hist) . . (+79) . . 1988 IMO Problems/Problem 4 (current)
- 11:35, 30 January 2021 (diff | hist) . . (+6,188) . . 1988 IMO Problems/Problem 3 (current)
- 11:32, 30 January 2021 (diff | hist) . . (+46) . . 1988 IMO Problems/Problem 2 (current)
- 11:32, 30 January 2021 (diff | hist) . . (+110) . . 1988 IMO Problems/Problem 1 (current)
- 11:29, 30 January 2021 (diff | hist) . . (+3,113) . . 1988 IMO Problems
- 11:12, 30 January 2021 (diff | hist) . . (-451) . . 1987 IMO Problems
- 11:12, 30 January 2021 (diff | hist) . . (0) . . 1986 IMO Problems/Problem 6 (current)
- 11:09, 30 January 2021 (diff | hist) . . (+5,094) . . N 1986 IMO Problems/Problem 6 (Created page with "==Problem== Given a finite set of points in the plane, each with integer coordinates, is it always possible to color the points red or white so that for any straight line <mat...")
- 11:06, 30 January 2021 (diff | hist) . . (+3,891) . . 1986 IMO Problems/Problem 5 (current)
- 11:02, 30 January 2021 (diff | hist) . . (+1,608) . . N 1986 IMO Problems/Problem 4 (Created page with "==Problem== Let <math>A,B</math> be adjacent vertices of a regular <math>n</math>-gon (<math>n\ge5</math>) with center <math>O</math>. A triangle <math>XYZ</math>, which is co...") (current)
- 11:01, 30 January 2021 (diff | hist) . . (+1,323) . . N 1986 IMO Problems/Problem 3 (Created page with "==Problem== To each vertex of a regular pentagon an integer is assigned, so that the sum of all five numbers is positive. If three consecutive vertices are assigned the number...")
- 00:04, 30 January 2021 (diff | hist) . . (+54) . . 1986 IMO Problems/Problem 2 (current)
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