P_2 union K_1

2-triangular honeycomb rook graph | 3-edge-transitive graph 4 | 3-graph 2 | 3-path complement graph

vertex count | 3 edge count | 1 connected component count | 2

acyclic | apex | asymmetric | bicolorable | bipartite | bridged | chordal | chordless | chromatically unique | class 1 | claw-free | determined by resistance | determined by spectrum | disconnected | edge-transitive | forest | integral | line graphs | matchstick | noncayley | nonempty | noneulerian | nonhamiltonian | no perfect matching | outerplanar | path complement | perfect | planar | projective planar | pseudoforest | simple | split | square-free | strongly perfect | triangle-free | triangular honeycomb rook | ungraceful | uniquely colorable | unit-distance | untraceable | weakly perfect | well covered

3-path graph

singleton graph

vertex degrees | 0 (1 vertex) | 1 (2 vertices)

radius | ∞ diameter | ∞ girth | ∞ vertex connectivity | 0 edge connectivity | 0

-((x - 1) x (x + 1))

x + 1

x

chromatic number | 2 edge chromatic number | 1

(-1)^1 0^1 1^1

(0 | 0 | 1 0 | 0 | 0 1 | 0 | 0)

(1 0 1)

Hosoya index | 2 Kirchhoff index | ∞ stability index | 0 Wiener index | ∞