![](https://dblp1.uni-trier.de/img/logo.ua.320x120.png)
![](https://dblp1.uni-trier.de/img/dropdown.dark.16x16.png)
![](https://dblp1.uni-trier.de/img/peace.dark.16x16.png)
Остановите войну!
for scientists:
![search dblp search dblp](https://dblp1.uni-trier.de/img/search.dark.16x16.png)
![search dblp](https://dblp1.uni-trier.de/img/search.dark.16x16.png)
default search action
"Comparing the expressiveness of downward fragments of the relation algebra ..."
Jelle Hellings et al. (2020)
- Jelle Hellings, Marc Gyssens
, Yuqing Wu, Dirk Van Gucht, Jan Van den Bussche
, Stijn Vansummeren, George H. L. Fletcher:
Comparing the expressiveness of downward fragments of the relation algebra with transitive closure on trees. Inf. Syst. 89: 101467 (2020)
![](https://dblp1.uni-trier.de/img/cog.dark.24x24.png)
manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.