[理工] [線代、離散]函數可逆、同構
有兩個問題想請問大家:
1.
http://i.imgur.com/lfY3P7J.jpg
題目如附圖,
黃子嘉老師的筆記上有寫到函數(T)若為可逆 iff T是1-1且onto,然後印象中T是否具1-1與onto的性質可直接由T的standard matrix A是否可逆判別
但這題的A不是方陣,而是扁矩陣,應該只具onto的性質,所以有點疑惑,為什麼T會可逆,然後這題的答案是true
2.兩張圖若同構,他們的同構函數一定是唯一的嗎?
麻煩大家了~謝謝!
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