[理工] 離散數學的證明題
大家好
Let S be a set of n points in the plane such that the distance between any two
is at least one .
Prove that there are at most 3n-3 pairs of points with distance exactly one.
https://imgur.com/a/Z4WyGPV
(附上原始題目)
請問看看有沒有大神可以證的出來或是提供點線索給小弟我
謝謝!
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 1.161.7.151
※ 文章網址: https://www.ptt.cc/bbs/Grad-ProbAsk/M.1545496138.A.44C.html
推
12/23 00:57,
5年前
, 1F
12/23 00:57, 1F
→
12/23 01:03,
5年前
, 2F
12/23 01:03, 2F
→
12/23 01:03,
5年前
, 3F
12/23 01:03, 3F
→
12/23 01:04,
5年前
, 4F
12/23 01:04, 4F
→
12/23 01:05,
5年前
, 5F
12/23 01:05, 5F
→
12/23 01:06,
5年前
, 6F
12/23 01:06, 6F
→
12/23 01:08,
5年前
, 7F
12/23 01:08, 7F
推
12/23 01:13,
5年前
, 8F
12/23 01:13, 8F
→
12/23 01:14,
5年前
, 9F
12/23 01:14, 9F
推
12/23 10:44,
5年前
, 10F
12/23 10:44, 10F
→
12/23 10:44,
5年前
, 11F
12/23 10:44, 11F
→
12/23 10:53,
5年前
, 12F
12/23 10:53, 12F
→
12/23 10:53,
5年前
, 13F
12/23 10:53, 13F
推
12/23 11:09,
5年前
, 14F
12/23 11:09, 14F
→
12/23 11:10,
5年前
, 15F
12/23 11:10, 15F
→
12/23 11:10,
5年前
, 16F
12/23 11:10, 16F
推
12/24 21:50,
5年前
, 17F
12/24 21:50, 17F
→
12/24 22:15,
5年前
, 18F
12/24 22:15, 18F
→
12/24 22:16,
5年前
, 19F
12/24 22:16, 19F