Tirohia te whiti i raro nei, ka whakahoki i te pātai i muri i roto i te reo ano rite te whiti: Passage: He maha ngā rōpū i te wa ano he rōpū, me ngā tauira o ētahi atu hanganga pāngarau. I roto i te reo o te kāwai ariā, ko ratou ahanoa rōpū i roto i te kāwai, te tikanga e he ahanoa ratou (i.e., tauira o te tahi atu hanganga pāngarau) e haere mai ki huringa (i huaina morphisms) e tāruatia te axioms rōpū. Hei tauira, he huinga hoki ia rōpū (rite tautuhia i runga ake), na he rōpū he ahanoa rōpū i roto i te kāwai o huinga. Pātai: He aha ia rōpū?
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