Mathematical Sciences Classification System
47Sxx - Other (nonclassical) types of operator theory 
[See also  46Sxx]
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                            47S10Operator theory over fields other than ${\bf R}$, ${\bf C}$ or the quaternions; non-Archimedean operator theory
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                            47S20Nonstandard operator theory [See also 03H05]
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                            47S30Constructive operator theory [See also 03F60]
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                            47S40Fuzzy operator theory [See also 03E72]
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                            47S50Operator theory in probabilistic metric linear spaces [See also 54E70]
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                            47S99None of the above, but in this section