## 2-regular graph

### Set

context | $V,E$ … set |

definiendum | $ \langle V,E,\psi\rangle \in \mathrm{it}(E,V) $ |

inclusion | $ \langle V,E,\psi\rangle $ … undirected graph |

for all | $ v\in V $ |

postulate | $ d(v)=2 $ |

### Discussion

A finite 2-regular graph consists disconnected cycles.

A general 2-regular graph consists disconnected cycles or infinite chains.