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M.González
M.González
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A bounded operator $K$ on $X$ satisfies $T+K$ Fredholm for each $T$ Fredholm if and only if $K$ is inessential. See P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers". Kluwer, 2004.P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers". Kluwer, 2004.

A bounded operator $K$ on $X$ satisfies $T+K$ Fredholm for each $T$ Fredholm if and only if $K$ is inessential. See P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers". Kluwer, 2004.

A bounded operator $K$ on $X$ satisfies $T+K$ Fredholm for each $T$ Fredholm if and only if $K$ is inessential. See P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers". Kluwer, 2004.

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M.González
M.González
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AnA bounded operator $K$ on $X$ satisfies $T+K$ Fredholm for each $T$ Fredholm if and only if $K$ is inessential. See P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers". Kluwer, 2004.

An bounded operator $K$ on $X$ satisfies $T+K$ Fredholm for each $T$ Fredholm if and only if $K$ is inessential. See P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers".

A bounded operator $K$ on $X$ satisfies $T+K$ Fredholm for each $T$ Fredholm if and only if $K$ is inessential. See P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers". Kluwer, 2004.

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M.González
M.González
  • 4.5k
  • 1
  • 16
  • 30

An bounded operator $K$ on $X$ satisfies $T+K$ Fredholm for each $T$ Fredholm if and only if $K$ is inessential. See P. Aiena, "Fredholm and Local Spectral Theory, with Applications to Multipliers".