Soit-p-End-E-on-pose-q-id-E-p-a-montrer-que-p-est-un-projecteur-si-et-seulement-si-q-est-un-projecteur-b-on-suppose-que-p-est-un-projecteur-et-on-considere-L-f-End-E-u-End-E-f-u-p-et-M-g Tinku Tara June 4, 2023 Algebra 0 Comments FacebookTweetPin Question Number 146001 by puissant last updated on 10/Jul/21 Soitp∈End(E).onposeq=idE−pa)montrerquepestunprojecteursietseulementsiqestunprojecteur..b)onsupposequepestunprojecteuretonconsidereL={f∈End(E)/∃u∈End(E),f=u∘p}etM={g∈End(E)/∃v∈End(E),g=v∘q}.montrerqueLetMsontdessousespacesvectorielssupplementairesdeEnd(E).. Answered by Olaf_Thorendsen last updated on 10/Jul/21 a)pestunprojecteur⇔p2=pdanscecasq2=(idE−p)o(idE−p)q2=idEoidE−poidE−idEop+popq2=idE−p−p+p2q2=idE−2p+p2q2=idE−2p2+p2q2=idE−p2q2=idE−p=qp2=p⇔q2=q:CQFD Terms of Service Privacy Policy Contact: info@tinkutara.com FacebookTweetPin Post navigation Previous Previous post: find-the-sum-of-x-2x-2-3x-3-4x-4-5x-5-6x-6-where-x-lt-1-Next Next post: Question-14938 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Save my name, email, and website in this browser for the next time I comment.