# Matrix analysis

study of matrices and their algebraic properties

Matrix analysis is a subfield of linear algebra. It focuses on analytical properties of matrices. In this subject, vector norms and matrix norms are introduced. The goal of this area is deepen understanding to matrix eigenvalues and system of linear equations. This leads to discussions in numerical linear algebra.[1][2][3][4][5]

## Main Topics

The following topics are studied in the context of matrix analysis:[1][2][3][4][5]

• Discussing matrices by tools from functional analysis
• Inequalities related to matrix norms or matrix eigenvalues[6][7][8][9]
• Behavior of matrix eigenvalues

## Significance

Functional analysis usually discusses mathematical operators in infinite dimension Hilbert spaces.[10] But difficulty remains even discussion is limited to matrices (which is a finite dimension mathematical operator). This is because difficulty comes not only from infinite dimension but also non-commutativity.[11][12][13] And matrices are good examples of non-commutative mathematical operators (In other words, you cannot change the order of matrix multiplication). Matrix analysis is trying to overcome problems caused by non-commutativity.[1][2][3][4][5]

## Achievements

The following results are known as remarkable achievements in this area:

## Journals

The following journals include articles about matrix analysis:

• SIAM Journal on Matrix Analysis and Applications (Published by the Society for Industrial and Applied Mathematics)
• Linear Algebra and its Applications
• Linear and Multilinear Algebra
• The Electronic Journal of Linear Algebra (Published by the International Linear Algebra Society)

## References

1. Horn, R. A., & Johnson, C. R. (2012). Matrix analysis. Cambridge University Press.
2. Bellman, R. (1997). Introduction to matrix analysis. SIAM.
3. Meyer, C. D. (2000). Matrix analysis and applied linear algebra. SIAM.
4. Bhatia, R. (2013). Matrix analysis. Springer Science & Business Media.
5. Applied Linear Algebra and Matrix Analysis, Thomas S. Shores, Undergraduate Texts in Mathematics (2018). Springer International Publishing.
6. Kittaneh, F. (1992). A note on the arithmetic-geometric-mean inequality for matrices. en:Linear Algebra and its Applications, 171, 1-8.
7. Bhatia, R., & Kittaneh, F. (2000). Notes on matrix arithmetic–geometric mean inequalities. Linear Algebra and Its Applications, 308(1-3), 203-211.
8. Bhatia, R., & Davis, C. (1993). More matrix forms of the arithmetic-geometric mean inequality. SIAM Journal on Matrix Analysis and Applications, 14(1), 132-136.
9. Cardoso, J. R., & Ralha, R. (2016). Matrix arithmetic-geometric mean and the computation of the logarithm. SIAM Journal on Matrix Analysis and Applications, 37(2), 719-743.
10. Conway, J. B. (2019). A course in functional analysis (Vol. 96). Springer.
11. Simon, B. (2015). Operator theory. American Mathematical Society.
12. Alpay, D., Cipriani, F., Colombo, F., Guido, D., Sabadini, I., & Sauvageot, J. L. (2016). Noncommutative analysis, operator theory and applications. Springer International Publishing.
13. Yoshino, Takashi (1993). Introduction to Operator Theory. Chapman and Hall/CRC. ISBN 978-0582237438.
14. Ando, T. (1995). Matrix young inequalities. In Operator theory in function spaces and Banach lattices (pp. 33-38). Birkhäuser Basel.
15. Lewis, A. S. (2000). Lidskii's theorem via nonsmooth analysis. SIAM Journal on Matrix Analysis and Applications, 21(2), 379-381.
16. F. Hansen, G.K. Pedersen, Jensen’s inequality for operators and Loewner’s theorem, Math. Ann. 258 (1982) 229–241.
17. F. Hansen, G.K. Pedersen, Jensen’s operator inequality, Bull. London Math. Soc. 35 (2003) 553–564.