47S10 Operator theory over fields other than ${R}$, ${C}$
or the quaternions; non-Archimedean operator theory
47S20 Nonstandard operator theory, See also {03H05}
47S30 Constructive operator theory, See also {03F65}
47S40 Fuzzy operator theory, See also {04A72}
47S50 Operator theory in probabilistic metric linear spaces
47S99 None of the above but in this section