Keyphrases
- gradient operators
- merging operators
- aggregation operators
- differential operators
- ordered weighted averaging
- connected operators
- revision operators
- translation invariant
- update operators
- edge detection
- relational operators
- laplacian operator
- morphological operators
- join operator
- computer vision
- logical properties
- context free
- data structure
- genetic algorithm
- query plan
- building blocks
- databases