2-1. Scalars, Vectors, Matrices and Tensors

• Scalars
• Vectors
• Matrices
• Tensors

2-2. Multiplication of Matrices and Vectors

• Matrix Product

$$ \bold{C = AB} $$

• Hadamard Product

$$ \bold{A}\odot\bold{B} $$

• Dot product

2-3. Identity and inverse Matrices

• Identity Matrix
• Matrix Inverse

2-4. Linear Dependence and Span

• Linear Combination
• Span
  • The span of a set of vectors is the set of all points obtainable by linear combination of original vectors.
• Existence of inverse vector