Reference Topics 16-4

This is an interactive site discussing matrix operations:
http://www.mathportal.org/calculators/matrices-calculators/matrix-operations-calculator.php

This is an interactive site finding inverse matrices:
http://www.mathportal.org/calculators/matrices-calculators/matrix-calculator.php

This is a nice matrix operation site which also includes Gauss-Jordan elimination:
http://matrix.reshish.com/inverse.phpSee the whole entry “Reference Topics 16-4”

Section 16.4: Inverse Matrices

16.4 Outline

  1. Matrix operations
    1. matrix equation
    2. equality
    3. addition
    4. multiplication by a scalar
    5. subtraction
    6. multiplication
    7. noncomformable
  2. Zero-one matrices
  3. Algebraic properties of matrices
    1. zero matrix
    2. identity matrix for multiplication
    3. main diagonal
    4. additive inverse
    5. multiplicative inverse
    6. properties
      1. commutative
      2. associative
      3. identity
      4. inverse
      5. distributive
  4. Inverse
See the whole entry “Section 16.4: Inverse Matrices”