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2. Noncirculant Toeplitz matrices all of whose powers are Toeplitz
- Creator:
- Griffin, Kent, Stuart, Jeffrey L., and Tsatsomeros, Michael J.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Toeplitz matrix, Toeplitz inverse, Toeplitz powers, principal minor, and Fibonacci sequence
- Language:
- English
- Description:
- Let $a$, $b$ and $c$ be fixed complex numbers. Let $M_n(a,b,c)$ be the $n\times n$ Toeplitz matrix all of whose entries above the diagonal are $a$, all of whose entries below the diagonal are $b$, and all of whose entries on the diagonal are $c$. For $1\leq k\leq n$, each $k\times k$ principal minor of $M_n(a,b,c)$ has the same value. We find explicit and recursive formulae for the principal minors and the characteristic polynomial of $M_n(a,b,c)$. We also show that all complex polynomials in $M_n(a,b,c)$ are Toeplitz matrices. In particular, the inverse of $M_n(a,b,c)$ is a Toeplitz matrix when it exists.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public