作者mqazz1 (无法显示)
看板Math
标题[线代] linear transformation
时间Mon May 9 19:13:54 2011
the linear transformation L: R2[x] -> R2[x] defined by L(ax^2 + bx + c)
= 2ax + b is one-to-one
书上说是句是错的
请问是错在哪边呢?
谢谢
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1F：→ wickeday :没有1-1喔 L(c)=0 for all c 05/09 19:17
2F：推 sm008150204 :L is one-to-one if and only if N(L) = {0} 05/09 22:46
3F：→ sm008150204 :再加上楼上的例子就说明啦 05/09 22:47