<span class="mw-page-title-namespace">Template</span><span class="mw-page-title-separator">:</span><span class="mw-page-title-main">Kato book80a</span>
Fabrice P. Lauss𝕪’s ℤulu Web

🕮Perturbation Theory of Linear Operators. T. Kato. Springer, Berlin, 1980.