elementary matrix
The matrix (i) is obtained from I by interchanging the second and fifth rows, matrix (ii) by multiplying the third row by −3, and matrix (iii) by adding 4 times the fifth row to the second row. Premultiplication of an m × n matrix A by an m × m elementary matrix produces the result of the corresponding row operation on A.
Alternatively, an elementary matrix can be seen as one obtained from the identity matrix by an elementary column operation; and post‐multiplication of an m × n matrix A by an n × n elementary matrix produces the result of the corresponding column operation on A.
- proof verification
- proper class
- proper divisor
- proper factor
- proper fraction
- proper map
- proper subset
- proper value
- proper vector
- proportion
- proportion
- proposition
- propositional logic
- pseudoinverse
- pseudometric
- pseudoprime
- pseudorandom numbers
- Ptolemy
- Ptolemy's Theorem
- public key cryptography
- pulley
- pure imaginary
- pure mathematics
- pure strategy
- PV