If V = W1 e ... Wk, then there exist k linear operators E,, .., E, On V such (1) each E, is a projection (E = E?); (ii) E;E; = 0, if i # j; (iii) I = E1 + .. + Exi (iv) the range of E; is W; Conversely, if E;,..., E, are k linear operators on V which satisfy conditions ), (ii), and (iii), and if we let W, be the range of E,, then V = W, e . Wk. i.... %3D

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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If V = W1 e .. e Wk, then there exist k linear operators E,, .., E, On V such that
(i) each E, is a projection (E = E;);
(ii) E;E; = 0, if i# j;
(iii) I = E1 +
(iv) the range of E; is W;
Conversely, if E, ..., E, are k linear operators on V which satisfy conditions
(1), (ii), and (iii), and if we let W, be the range of E;, then V = W; e . OWg.
+ Eki
...
Transcribed Image Text:If V = W1 e .. e Wk, then there exist k linear operators E,, .., E, On V such that (i) each E, is a projection (E = E;); (ii) E;E; = 0, if i# j; (iii) I = E1 + (iv) the range of E; is W; Conversely, if E, ..., E, are k linear operators on V which satisfy conditions (1), (ii), and (iii), and if we let W, be the range of E;, then V = W; e . OWg. + Eki ...
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