directed rough graph

Cayley graph normal Cayley graph

General graph of complete graph

1-D band-limited Weierstrass fractal rough surface

1D exponential rough soil surface

2-D fractal rough surface

2-high rough mill

3-axis rough machining

3-D random rough surface

4-high rough mill

a Covering Generalized Rough Set

a rough diamond

aerodynamically rough surface

analysis on rough sets

approximate rough degree

As-cast ferritic ductile iron threaded pipe fitting rough castings

attribute classification rough degree

Axiom Groups of Rough Set

Axiomatic Systems of Rough Fuzzy Sets