അത് ചെയ്യുന്നതിന്, ഞാൻ ആദ്യം ഒരു ഫംഗ്ഷൻ നിർവചിക്കും. അത് ഒരു ഹോമോമോർഫിസമാണെന്ന് കാണിക്കും, തുടർന്ന് അത് ബൈജക്ടീവ് ആണെന്ന് കാണിക്കും.
అలా చేయడానికి, మనం మొదట ఒక ఫంక్షన్ ను నిర్వచిస్తాము, మనం దానిని హోమోమార్ఫిజం అని చూపిస్తాము, ఆపై అది బైజెక్టివ్ అని చూపిస్తాము.