For the request "set":
N2046: Bool_set: multi-valued logic from H. Br�nnimann, G. Melquiond, S. Pion
https://wg21.link/n2046N2050: Proposal to Add a Dynamically Sizeable Bitset to the Standard Library Technical Report Revision 1 from J. Allsop, A. Meredith, G. Prota
https://wg21.link/n2050N2136: Bool_set: multi-valued logic (revision 1) from H. Br�nnimann, G. Melquiond, S. Pion
https://wg21.link/n2136N3586: Splicing Maps and Sets from A. Talbot, H. Hinnant
https://wg21.link/n3586N3617: Lifting overload sets into function objects from Philipp Juschka
https://wg21.link/n3617N3645: Splicing Maps and Sets (Revision 1) from A. Talbot, H. Hinnant, J. Dennett, J. Wakely
https://wg21.link/n3645N3987: Yet another set of C++ type traits. from C. Silva, D. Auresco
https://wg21.link/n3987N4150: Alias-Set Attributes: Toward restrict-like aliasing semantics for C++ from H. Finkel, H. Tong, et al.
https://wg21.link/n4150N4202: Strongly Typed Bitset from Matthew Fioravante
https://wg21.link/n4202N4368: Introducing alias size_type for type size_t in class std::bitset from Vladimir Grigoriev
https://wg21.link/n4368N4443: Introducing alias size_type for type size_t in class std::bitset (Rev. 1 ) from Vladimir Grigoriev
https://wg21.link/n4443N4494: Multidimensional bounds, offset and array_view, revision 6 from Lukasz Mendakiewicz, Herb Sutter
https://wg21.link/n4494N4512: Multidimensional bounds, offset and array_view, revision 7 from _ukasz Mendakiewicz, Herb Sutter
https://wg21.link/n4512P0083R0: Splicing Maps and Sets (Revision 2) from Alan Talbot
https://wg21.link/p0083r0P0083R1: Splicing Maps and Sets (Revision 3) from Alan Talbot, Jonathan Wakely, Howard Hinnant, James Dennett
https://wg21.link/p0083r1P0083R2: Splicing Maps and Sets (Revision 4) from Alan Talbot, Jonathan Wakely, Howard Hinnant, James Dennett
https://wg21.link/p0083r2P0083R3: Splicing Maps and Sets (Revision 5) from Alan Talbot, Jonathan Wakely, Howard Hinnant, James Dennett
https://wg21.link/p0083r3P0119R0: Overload sets as function arguments from Andrew Sutton
https://wg21.link/p0119r0P0119R1: Overload sets as function arguments from Andrew Sutton
https://wg21.link/p0119r1P0119R2: Overload sets as function arguments from Andrew Sutton
https://wg21.link/p0119r2There are more papers. Please use more precise query.