j0hannes  filed a deletion request for docear :
upstream project has been abandoned
"Update 2017-08-24: Please note that for the foreseeable future we will not continue the development of Docear as we have not enough funding and time." (https://www.scss.tcd.ie/joeran.beel/blog/2017/02/05/docears-online- services-are-down-recommendation-user-registration-backup/)
Request #15435 has been rejected by polyzen :
Package has received updates and at least one vote since the deprecation.