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Vector Subspace: Subspace Theorems & Examples Video Lecture | Mathematics for Competitive Exams

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FAQs on Vector Subspace: Subspace Theorems & Examples Video Lecture - Mathematics for Competitive Exams

1. What are vector subspaces?
Ans. Vector subspaces are subsets of a vector space that satisfy three conditions: closure under addition (if u and v are in the subspace, then u+v is also in the subspace), closure under scalar multiplication (if u is in the subspace and c is a scalar, then cu is also in the subspace), and containing the zero vector (the subspace must contain the zero vector).
2. What are some examples of vector subspaces?
Ans. Examples of vector subspaces include the set of all solutions to a homogeneous linear system (also known as the null space or kernel), the span of a set of vectors, and the column space and row space of a matrix.
3. What are the subspace theorems related to vector subspaces?
Ans. The subspace theorems state that if a subset of a vector space satisfies the closure properties (closure under addition and scalar multiplication) and contains the zero vector, it is a subspace. Additionally, any intersection of subspaces is also a subspace, and the union of subspaces may or may not be a subspace.
4. How can vector subspaces be visualized?
Ans. Vector subspaces can be visualized as planes, lines, or even just the origin in three-dimensional space. In two-dimensional space, subspaces can be visualized as lines or the origin. The dimension of a subspace corresponds to the number of linearly independent vectors needed to span it.
5. What is the significance of vector subspaces in mathematics?
Ans. Vector subspaces play a fundamental role in linear algebra and various areas of mathematics. They allow for the study of linear transformations, eigenvectors, and eigenvalues, as well as providing a framework for solving systems of linear equations and understanding the properties of matrices.
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