06XX 


Order, lattices, ordered algebraic structures [See also 18B35] 

06Dxx 

Distributive lattices 


06D05 
Structure and representation theory 


06D10 
Complete distributivity 


06D15 
Pseudocomplemented lattices 


06D20 
Heyting algebras [See also 03G25] 


06D22 
Frames, locales {For topological questions see 54XX} 


06D25 
Post algebras [See also 03G20] 


06D30 
De Morgan algebras, Ćukasiewicz algebras [See also 03G20] 


06D35 
MValgebras 


06D50 
Lattices and duality 


06D72 
Fuzzy lattices (soft algebras) and related topics 


06D99 
None of the above, but in this section 