Let S : V → W and T : V → W be linear mappings, and let A be a subset of V such that Span A = V . Prove that, if Sx = T x for all x ∈ A, then S = T.
Q2 - Linear Algebra - Fundamental Subspaces, linear mappings,
etc
Let U, V, and W be vector spaces. Verify that if L :V → W and M : W →U are both linear mappings, then so is the composition MoL:V → U. Moreover, prove that if L and M are both invertible linear mappings, then so is Mo L.
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Let T: V-W be a linear transformation between vector spaces V and W (1) Prove that if T is injective (one-to-one) and {vi,.. ., vm) is a linearly independent subset of V the n {T(6),…,T(ền)} is a linearly independent subset of W (2) Prove that if the image of any linearly independent subset of V is linearly independent then Tis injective. (3) Suppose that {b1,... bkbk+1,. . . ,b,) is a...
Problem 6. Let V, W, and U be finite-dimensional vector spaces, and let T : V → W and S : W → U be linear transformations (a) Prove that if B-(Un . . . , v. . . . ,6) is a basis of V such that Bo-(Un .. . ,%) s a basis of ker(T) then (T(Fk+), , T(n)) is a basis of im(T) (b) Prove that if (w!, . . . ,u-, υ, . . . ,i)...
Let T: V + W be a linear transformation. Assume that T is one-to-one. Prove that if {V1, V2, V3} C V is a linearly independent subset of V, then {T(01), T(v2), T(13)} C W is a linearly independent subset of W.
Proble m 3. Let T: V ->W be (1) Prove that if T is then T(),... ,T(Fm)} is a linearly indepen dent subset of W (2) Prove that if the image of any linearly in depen dent subset of V is linearly indepen dent then T is injective (3) Suppose that {,... ,b,b^1,...,5} is Prove that T(b1), .. . , T(b,)} is a basis of im(T) (4) Let v1,. Vk} be T(v1),..,T(vk) span W lin ear transform ation between vector...
Verify (2) and (3) of Theorem 26.5.
m 26.5. Let T :V →W be a linear transformation: let Theore T c(w)-*(V) be the dual transformation. Then: (1) T* is linear. (3) If S : W → X is a linear transformation, then (SoT)" f = T(S* f). Proof. The proofs are straightforward. One verifies (1), for instance, as follows: whence T. (af + bg) = a T* f + bT" g. ロ The following diagrams illustrate property (3): c*(W) S*...
Let V and W be vector spaces over F, and let f: V W be a linear transformation. (a) Prove that f is one-to-one if and only if f carries linearly independent (b) Suppose that f is one-to-one and that S is a subset of V. Prove that subsets of V to linearlv independent subsets of W S is linearly independent if and only if (S) is linearly independent.
suppose that s=(v1,v2,......vm) is a finite set of linearly independent vectors in V, and w ∈ V some other vector. Let T= S ∪ (W). Prove that T is not linearly independent if and only if w∈ span(s).
Problem. Let V be a vector space and W c V be a s ubspace. Prove that there are canonical isomorphisms (a) (V/W)W; and Note: You may take "canonical mappings" to mean that they are independent of choices of bases, or that they can be defined without requiring choices of bases.
Problem. Let V be a vector space and W c V be a s ubspace. Prove that there are canonical isomorphisms (a) (V/W)W; and Note: You may take "canonical...
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3. Let T: V- V be a linear transformation on a 3-dimensional vector space V, with basis B- (v,2, v3 ff TW C w. A subspace W CV is invariant under T' 1 (a) Prove that if W and W2 are invariant subspaces under T, then Winw2 and Wi+W2 are invariant under T. (b) Find conditions a matrix representation Ms (T) such that the following subspaces are invariant under T span vspan...