order-zero graph

the unique graph having no vertices

en-GB/ˈɔːdə - ˈzɪəɹəʊ ɡɹɑːf/
en-US/ˈɑɹdɚ - ˈziɹoʊ ˈɡɹæf/

分类：

simple graphedgeless graphself-complementary graphcomplete graph