Spectrum of an algebraic element

Spectral mapping theorem

Let ๐ด be a ๐•‚-monoid over an algebraically closed field ๐•‚. Let ๐‘Ž โˆˆ๐ด and ๐‘(๐‘ฅ) โˆˆ๐•‚[๐‘ฅ]. Then the spectra satisfy1 #m/thm/falg

Specโก(๐‘(๐‘Ž))=๐‘(Specโก(๐‘Ž))={๐‘(๐œ†),๐œ†โˆˆSpecโก(๐‘Ž)}
Proof

#missing/proof


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Footnotes

  1. Stated with partial proof in 2008. Advanced Linear Algebra, ยง18, p. 461 โ†ฉ