Let V be a finite dimensional inner product space and let U and W be subspaces of V . Note: parts (a) and (b) are unrelated. (a) If dim U + dim W # dim V , prove that W U-. (b) If there exists a non-zero vector v € U-nW , show that V +U +W.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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[Linear Algebra] How do you prove this?

Let V be a finite dimensional inner product space and let U and W be subspaces of V . Note: parts (a) and
(b) are unrelated.
(a)
If dim U + dim W + dim V , prove that W U-.
(b)
If there exists a non-zero vector v e U+nW! , show that V +U +W.
Transcribed Image Text:Let V be a finite dimensional inner product space and let U and W be subspaces of V . Note: parts (a) and (b) are unrelated. (a) If dim U + dim W + dim V , prove that W U-. (b) If there exists a non-zero vector v e U+nW! , show that V +U +W.
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