47L45 Dual algebras; weakly closed singly generated operator algebras

47L55 Representations of (nonselfadjoint) operator algebras

47L60 Algebras of unbounded operators; partial algebras of operators

47L65 Crossed product algebras (analytic crossed products)

47L70 Nonassociative nonselfadjoint operator algebras

47L75 Other nonselfadjoint operator algebras

47L80 Algebras of specific types of operators (Toeplitz, integral, pseudodifferential, etc.)

47L90 Applications of operator algebras to physics

47L99 None of the above, but in this section

47Nxx Miscellaneous applications of operator theory [See also <a href="#code:46Nxx">46Nxx</a>]

47N10 Applications in optimization, convex analysis, mathematical programming, economics

47N20 Applications to differential and integral equations

47N30 Applications in probability theory and statistics

47N40 Applications in numerical analysis [See also <a href="#code:65Jxx">65Jxx</a>]

47N50 Applications in the physical sciences

47N60 Applications in chemistry and life sciences

47N70 Applications in systems theory, circuits, and control theory

47N99 None of the above, but in this section

47Sxx Other (nonclassical) types of operator theory [See also <a href="#code:46Sxx">46Sxx</a>]

47S10 Operator theory over fields other than ${\bf R}$, ${\bf C}$ or the quaternions; non-Archimedean operator theory

47S20 Nonstandard operator theory [See also <a href="#code:03H05">03H05</a>]

47S30 Constructive operator theory [See also <a href="#code:03F60">03F60</a>]

47S40 Fuzzy operator theory [See also <a href="#code:03E72">03E72</a>]

47S50 Operator theory in probabilistic metric linear spaces [See also <a href="#code:54E70">54E70</a>]

47S99 None of the above, but in this section

49-XX Calculus of variations and optimal control; optimization [See also <a href="#code:34H05">34H05</a>, <a href="#code:34K35">34K35</a>, <a href="#code:65Kxx">65Kxx</a>, <a href="#code:90Cxx">90Cxx</a>, <a href="#code:93-XX">93-XX</a>]

49-00 General reference works (handbooks, dictionaries, bibliographies, etc.)