54XX 


General topology {For the topology of manifolds of all dimensions, see 57Nxx} 

54Axx 

Generalities 


54A05 
Topological spaces and generalizations (closure spaces, etc.) 


54A10 
Several topologies on one set (change of topology, comparison of topologies, lattices of topologies) 


54A15 
Syntopogeneous structures 


54A20 
Convergence in general topology (sequences, filters, limits, convergence spaces, etc.) 


54A25 
Cardinality properties (cardinal functions and inequalities, discrete subsets) [See also 03Exx} {For ultrafilters, see 54D80]} 


54A35 
Consistency and independence results [See also 03E35] 


54A40 
Fuzzy topology [See also 03E72] 


54A99 
None of the above, but in this section 