User contributions for Gispzjz
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12 June 2024
- 13:1713:17, 12 June 2024 diff hist 0 组合数学 (Spring 2024) →Announcement
- 13:1613:16, 12 June 2024 diff hist +36 组合数学 (Spring 2024) →Announcement
- 13:1613:16, 12 June 2024 diff hist +95 组合数学 (Spring 2024) →Announcement
14 May 2024
- 15:5515:55, 14 May 2024 diff hist +1 组合数学 (Spring 2024)/Problem Set 3 →Problem 5
- 15:5515:55, 14 May 2024 diff hist +2,925 N 组合数学 (Spring 2024)/Problem Set 3 Created page with "== Problem 1 == Solve the following two existence problems: * You are given <math>n</math> integers <math>a_1,a_2,\dots,a_n</math>, such that for each <math> 1\leq i\leq n</math> it holds that <math>i-n\leq a_i\leq i-1</math>. Show that there exists a '''nonempty''' subsequence (not necessarily consecutive) of these integers, whose sum is equal to <math> 0 </math>. (Hint: Consider <math> b_i=a_i-i </math>) * You are given two '''multisets''' <math> A </math> and <ma..."
- 15:2415:24, 14 May 2024 diff hist +61 组合数学 (Spring 2024) →Assignments
20 March 2024
- 12:1412:14, 20 March 2024 diff hist +11 组合数学 (Fall 2024)/Problem Set 1 →Problem 4 current
- 12:1412:14, 20 March 2024 diff hist +21 组合数学 (Fall 2024)/Problem Set 1 →Problem 4
- 12:1012:10, 20 March 2024 diff hist +38 组合数学 (Fall 2024)/Problem Set 1 →Problem 4
19 March 2024
- 14:5914:59, 19 March 2024 diff hist +8 组合数学 (Fall 2024)/Problem Set 1 →Problem 5
- 12:4412:44, 19 March 2024 diff hist +28 组合数学 (Fall 2024)/Problem Set 1 →Problem 5
- 12:4312:43, 19 March 2024 diff hist +17 组合数学 (Fall 2024)/Problem Set 1 →Problem 4
- 12:4312:43, 19 March 2024 diff hist +17 组合数学 (Fall 2024)/Problem Set 1 →Problem 3
- 12:4212:42, 19 March 2024 diff hist +6 组合数学 (Fall 2024)/Problem Set 1 →Problem 5
- 12:4212:42, 19 March 2024 diff hist +1,642 N 组合数学 (Fall 2024)/Problem Set 1 Created page with "== Problem 1 == How many <math>n\times m</math> matrices of <math>0</math>'s and <math>1</math>'s are there, such that every row and column contains an even number of <math>1</math>'s? An odd number of <math>1</math>'s? == Problem 2 == * There is a set of <math>2n</math> people: <math>n</math> male and <math>n</math> female. A good party is a set with the same number of male and female. How many possibilities are there to build such a good party? * Try to express the a..."
- 12:4212:42, 19 March 2024 diff hist +53 组合数学 (Spring 2024) →Assignments
8 June 2023
- 14:2614:26, 8 June 2023 diff hist −30 组合数学 (Fall 2023)/Problem Set 4 →Problem 1
- 14:2614:26, 8 June 2023 diff hist +31 组合数学 (Fall 2023)/Problem Set 4 →Problem 1
- 14:2214:22, 8 June 2023 diff hist +136 组合数学 (Fall 2023)/Problem Set 4 →Problem 1