Left examples are called "bipartite graphs."
Adjacent-numbered pages: BP571 BP572 BP573 BP574 BP575  *  BP577 BP578 BP579 BP580 BP581
precise, allsorted, notso, math, traditional, preciseworld
graph [smaller | same | bigger]
Aaron David Fairbanks
https://en.wikipedia.org/wiki/Graph_theory
https://en.wikipedia.org/wiki/Connectivity_(graph_theory)
Adjacent-numbered pages: BP1095 BP1096 BP1097 BP1098 BP1099  *  BP1101 BP1102 BP1103 BP1104 BP1105
precise, allsorted, world, preciseworld
graph [smaller | same | bigger]zoom in left (connected_graph) | zoom in right (disconnected_graph)
Leo Crabbe