5. Let p = i o projw : R" → W → R" be the function defined by orthogonal projection onto W followed by inclusion, i.e. i(x) = x for all xe W. Show that the null space of Null(p) := {v € R" : p(v) = 0}

Elementary Linear Algebra (MindTap Course List)
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Chapter4: Vector Spaces
Section4.4: Spanning Sets And Linear Independence
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5. Let p = io projw : R" → W → R" be the function defined by orthogonal projection onto W
followed by inclusion, i.e. i(x)
= x for all xE W. Show that the null
space
of
Null(p) := {v E R" : p(v) = 0}
is exactly W-. Now explain why and how one can deduce (*) from this result and the rank
theorem.
1
Transcribed Image Text:5. Let p = io projw : R" → W → R" be the function defined by orthogonal projection onto W followed by inclusion, i.e. i(x) = x for all xE W. Show that the null space of Null(p) := {v E R" : p(v) = 0} is exactly W-. Now explain why and how one can deduce (*) from this result and the rank theorem. 1
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