35R50 Partial differential equations of infinite order

35R60 Partial differential equations with randomness, stochastic partial differential equations  [See also <a href="#code:60H15">60H15</a>]

35R70 Partial differential equations with multivalued right-hand sides

35R99 None of the above, but in this section

35Sxx Pseudodifferential operators and other generalizations of partial differential operators [See also <a href="#code:47G30">47G30</a>, <a href="#code:58J40">58J40</a>]

35S10 Initial value problems for pseudodifferential operators

35S11 Initial-boundary value problems for pseudodifferential operators

35S15 Boundary value problems for pseudodifferential operators

35S35 Topological aspects: intersection cohomology, stratified sets, etc. [See also <a href="#code:32C38">32C38</a>, <a href="#code:32S40">32S40</a>, <a href="#code:32S60">32S60</a>, <a href="#code:58J15">58J15</a>]

35S99 None of the above, but in this section

37-XX Dynamical systems and ergodic theory [See also <a href="#code:26A18">26A18</a>, <a href="#code:28Dxx">28Dxx</a>, <a href="#code:34Cxx">34Cxx</a>, <a href="#code:34Dxx">34Dxx</a>, <a href="#code:35Bxx">35Bxx</a>, <a href="#code:46Lxx">46Lxx</a>, <a href="#code:58Jxx">58Jxx</a>, <a href="#code:70-XX">70-XX</a>]

37-00 General reference works (handbooks, dictionaries, bibliographies, etc.)

37-01 Instructional exposition (textbooks, tutorial papers, etc.)

37-02 Research exposition (monographs, survey articles)

37-03 Historical (must also be assigned at least one classification number from Section 01)

37-04 Explicit machine computation and programs (not the theory of computation or programming)

37-06 Proceedings, conferences, collections, etc.

37Axx Ergodic theory [See also <a href="#code:28Dxx">28Dxx</a>]

37A10 One-parameter continuous families of measure-preserving transformations

37A15 General groups of measure-preserving transformations [See mainly <a href="#code:22Fxx">22Fxx</a>]

37A17 Homogeneous flows [See also <a href="#code:22Fxx">22Fxx</a>]

37A20 Orbit equivalence, cocycles, ergodic equivalence relations