4. Let B- (v, Va. Vn) be a basis of a vector space, V. a) Prove just ONE of the following: • If S- {u, ua, Um) pans V then m 2n. • If S- (ui. ua, .. Um) is linearly independent then m Sn. b) Use (a) to show that the definition of dimension of V is well defined: That is, if B = {V1, Va, Va) and B (u1, u2, , um) are bases of V then m = n.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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4. Let \( B = \{v_1, v_2, \ldots, v_n\} \) be a basis of a vector space, \( V \).

a) Prove just ONE of the following:
- If \( S = \{u_1, u_2, \ldots, u_m\} \) spans \( V \) then \( m \geq n \).
- If \( S = \{u_1, u_2, \ldots, u_m\} \) is linearly independent, then \( m \leq n \).

b) Use (a) to show that the definition of dimension of \( V \) is well defined:
That is, if \( B_1 = \{v_1, v_2, \ldots, v_m\} \) and \( B_2 = \{u_1, u_2, \ldots, u_n\} \) are bases of \( V \) then \( m = n \).
Transcribed Image Text:4. Let \( B = \{v_1, v_2, \ldots, v_n\} \) be a basis of a vector space, \( V \). a) Prove just ONE of the following: - If \( S = \{u_1, u_2, \ldots, u_m\} \) spans \( V \) then \( m \geq n \). - If \( S = \{u_1, u_2, \ldots, u_m\} \) is linearly independent, then \( m \leq n \). b) Use (a) to show that the definition of dimension of \( V \) is well defined: That is, if \( B_1 = \{v_1, v_2, \ldots, v_m\} \) and \( B_2 = \{u_1, u_2, \ldots, u_n\} \) are bases of \( V \) then \( m = n \).
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