Comparing the expressiveness of downward fragments of the relation algebra with transitive closure on trees

2020 ◽  
Vol 89 ◽  
pp. 101467 ◽  
Author(s):  
Jelle Hellings ◽  
Marc Gyssens ◽  
Yuqing Wu ◽  
Dirk Van Gucht ◽  
Jan Van den Bussche ◽  
...  
2020 ◽  
Vol 21 (4) ◽  
pp. 1-31
Author(s):  
Liron Cohen ◽  
Reuben N. S. Rowe

2005 ◽  
Vol 52 (2) ◽  
pp. 147-156 ◽  
Author(s):  
Camil Demetrescu ◽  
Giuseppe F. Italiano

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