P_2

0-Dorogovtsev-Goltsev-Mendes graph | (1, 1, 2)-grid graph | (1, 1)-bipartite (0, 2)-graph | (1, 1)-complete bipartite graph | (1, 1)-Sierpiński simplex graph | (1, 1)-spoke graph | (1, 1)-stacked book graph | (1, 2)-bar graph | (1, 2)-Hamming graph | (1, 2)-king graph | ...

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

acyclic | almost controllable | Andrásfai | antipodal | apex | arc-transitive | arrangement | bicolorable | bipartite | black bishop | block | bridged | Bruhat | cactus | caterpillar | Cayley graphs | centipede | chordal | chordless | chromatically unique | circulant | class 1 | claw-free | complete | complete bipartite | complete k-partite | conformally rigid | connected | determined by resistance | determined by spectrum | distance-hereditary | distance-regular | distance-transitive | dominating unique | Dorogovtsev-Goltsev-Mendes | edge-transitive | Fibonacci cube | folded cube | forest | geodetic | geometric | graceful | grid | Haar | halved cube | Hamilton-connected | Hamilton-laceable | Hamming | highly irregular | H-star connected | hypercube | integral | Johnson | king | Kneser | Knödel | KP | k-tree | ladder | ladder rung | Laman | line graphs | linklessly embeddable | lobster | local | map | matchstick | maximally nonhamiltonian | median | Meyniel | Mycielski | nonempty | noneulerian | nonhamiltonian | nuciferous | Ore | outerplanar | path | Pell | perfect | perfect matching | permutation star | planar | projective planar | pseudoforest | pseudotree | Ptolemaic | quadratically embeddable | queen | regular | rigid | rook | series-reduced | simple | smallest fully forested | split | spoke | square-free | stacked book | star | strongly perfect | symmetric | traceable | transposition | tree | triangle-free | Turán | unigraphic | uniquely colorable | uniquely embeddable | uniquely graceful | unit-distance | unswitchable | vertex-transitive | weakly perfect | weakly regular | well covered | white bishop | zero-two

2-empty graph

singleton graph

vertex degrees | 1 (2 vertices)

radius | 1 diameter | 1 girth | ∞ vertex connectivity | 1 edge connectivity | 1

(x - 1) (x + 1)

x + 1

x

chromatic number | 2 edge chromatic number | 1

(-1)^1 1^1

(0 | 1 1 | 0)

(1 1)

Hosoya index | 2 Kirchhoff index | 1 stability index | 2 Wiener index | 1