We provide three operators which modify the query results by performing second-order operations on the original query. To invoke the operators, enter the corresponding operator before your search terms (enclosing your search terms in parentheses) in the search box.

Trending – returns the list of documents most read by users who read recent papers on the topic being researched; these are papers currently being read by people interested in this field. For example:

trending(exoplanets)

will return a ranked list of papers which are currently popular among the readers interested in exoplanets.

Useful – returns the list of documents frequently cited by the most relevant papers on the topic being researched; these are studies which discuss methods and techniques useful to conduct research in this field. For example:

useful("galaxy surveys")

will return a ranked list of papers spanning a variety of topics useful to researchers interested in analyzing surveys of galaxies.

Reviews – returns the list of documents citing the most relevant papers on the topic being researched; these are papers containing the most extensive reviews of the field. For example:

reviews("weak lensing")

will return a ranked list of papers featuring reviews of weak gravitational lensing and its cosmological implications.

TopN – returns the list of top N documents for a user defined query, where they are ordered by their score or a user specified sort. For example:

topn(200, title:hubble, citation_count desc)

will return the first 200 most cited papers for documents that habe “hubble” in their title.