http://blog.ofset.org/~ckhung/b/
數學類: 觀念與工具(gnuplot), 線性代數, DrGeo 幾何教學
理論類: 演算法, 線性規劃
程式設計類: 通論, perl, c, c++, tcl, tk, 雜記
指令類: 命令列讀本, 命令列觀念, 系統管理, slax,
其他: inkscape/SVG
This warehouse is a place for Sadless to memorize things. Because of Sadless are alway forgetting something, someone, some terms, some time, some where, etc.. It should be a way to rescue him out of the hell... Hope so...
http://en.wikipedia.org/wiki/Transpose_graph
http://en.wikipedia.org/wiki/Graph_theory
http://blog.ofset.org/~ckhung/b/dm/brgr.php
terminology:
vertex, edge, relation, graph, binary relation
origin, destination, incident vertex, incident edge
adjecency matrix, adjecency link, dense graph, sparse graph
symetric relation, undirected graph
non-symetric relation, directed graph
asymetric relation
antisymetric relation
inverse relation, transpose graph, reverse graph
complement relation, complement graph
http://blog.ofset.org/~ckhung/b/dm/graph.php
successor, predecessor, neighbor
in-degree, out-degree
loop
parallel edges
simple graph
isolated vertex
simple path
b is accessible from a
b is reachable from a
simple cycle
connected, disconnected
connected component
weighted graph
subgraph
spanning tree, minimal spanning tree
spanning forest
directed acyclic graph, DAG
complete graph, Cn取2, Kn = n(n-1)/2
bipartite graph, Kmn = mn
articulation point, bridge
separable graph, non-seperable graph, biconnected graph
maximal biconnected graph, biconnected component
maximal strongly connected graph, maximal strongly connected component
strongly connected component ===> DAG , component ===> Vertex
one-to-one correspondence
isomophism, isomophic graphs, automophism
planar graph
dual graph
Euler's Equation : v-e+r = 2
homeomorphic
http://blog.ofset.org/~ckhung/b/al/graph.php
手沖咖啡, 10g 粉兌100cc 水, 水多了, 咖啡就開始難喝了.
一開始, 總覺得浪費, 10g粉才泡出100cc 的咖啡.
總用個300cc水下去沖, 量比較多, 看起來也比較省.
但是跟100cc水沖出來的比較, 總還是100cc沖出來的咖啡比較好喝.
想想, 量雖多了, 質卻減了.
不僅減了, 還是大減.
如果要喝這樣的咖啡, 就不用去買這樣好的咖啡粉了.
想想自己的目的是什麼?
是喝很多的咖啡? 還是很好喝的咖啡?
突然想到了一個名詞~邊際價值(Margin Value).
所以, 有時候節省反而是浪費.
就這樣浪費了好的咖啡粉了.
10g 的粉還是只兌100cc的水比較好喝.
長安西路 216號
一間賣油飯, 肉羹湯, 甜不辣的店, 小小一間店面, 生意卻很好. 的確好吃. 旁邊是一間眼鏡店.
看老闆身上穿的新圓環的圍兜, 大概是從圓環過來的老店.