Saturday, October 17, 2009
Hasse diagram of powerset

In mathematics, especially order theory, a partially ordered set (or poset) formalizes the intuitive concept of an ordering, sequencing, or arrangement of the elements of a set. A poset consists of a set together with abinary relation that describes, for certain pairs of elements in the set, the requirement that one of the elements must precede the other. However, a partially ordered set differs from a total order in that some pairs of elements may not be related to each other in this way. A finite poset can be visualized through its Hasse diagram, which depicts the ordering relation between certain pairs of elements and allows one to reconstruct the whole partial order structure.
A familiar real-life example of a partially ordered set is a collection of people ordered by genealogical descendancy. Some pairs of people bear the ancestor-descendant relationship, but other pairs bear no such relationship
Monday, October 12, 2009
요새, 나의 잡담/ 혼자서
정신분열증을 위한 다정한 자장가 목록 같지 않아여?
안녕!
227
우체통_여기에
raintree
2009/10/12
2
0
니가 보는 대로 보여
cool
2009/10/12
5
0
225
마추피추_극과 극
raintree
2009/10/11
6
0
224
사이키델릭 돌진
raintree
2009/10/08
3
0
223
잠 속의 꿈
cool
2009/10/05
5
0
222
a little light musik
raintree
2009/10/01
3
0
221
신난다
raintree
2009/09/30
3
0
220
두 개의 그림
raintree
2009/09/30
3
0
219
하농 연주회
raintree
2009/09/29
3
0
218
노란 건물
raintree
2009/09/28
3
0
217
꽃잎같은 말들
raintree
2009/09/27
7
0
216
뛰어노는 이미지
raintree
2009/09/25
6
0