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[obm-l] duvida - Vietnam Undergraduate Mathemtics Competition 2001
- To: obm-l@xxxxxxxxxxxxxx
- Subject: [obm-l] duvida - Vietnam Undergraduate Mathemtics Competition 2001
- From: "Jhonata Ramos" <obm.jhon@xxxxxxxxx>
- Date: Mon, 19 Feb 2007 14:00:43 -0200
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Pessoal,
tava olhando essa questão:
Let be given two matrices A, B from M_n(R) such that A^2001 = 0 and AB
= A+B. Show that det(B) = 0.
Source VUMC 2001
Vi uma solução que o cara fala o seguinte:
A^2001=0 => A is nipoltent detA=0
lemma: If X,Y commute, Y nilpotent
then det(X+Y)=detX
Gostaria de saber o que significa, nipoltent (não a tradução :)
e se o lemma dele ali é verdadeiro,
Forte abraço,
Jhonata Emerick Ramos
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