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NEKG33 Mathematical methods for economists
Chapter 22
Introduction to matrices
Matrices, definitions
Special matrices
Row- and column vectors
Vectors
Addition, scalar multiplication and transpose
Matrix addition and scalar multiplication
Algebraic rules for matrix addition and scalar multiplication
Matrix transpose
Matrices: Problems
Problem: Construct matrix
Problem: Add matrices
Problem: Matrix equality
Problem: Add and subtract matrices
Problem: Linear combinations of 2 column vectors
Problem: Linear combinations of 3 row vectors
Problem: Linear combinations of 2 column vectors backwards
Problem: What can you say about the components of a vector?
Problem: Linear combination of 2 vectors, find the constants
Problem: Matrix transpose
Problem: Symmetric matrices
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Chapter 22
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Problem: Linear combinations of 3 row vectors
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