TITLE: Handling arXiv feeds to avoid duplicates
QUESTION [30 upvotes]: I subscribe to feeds from the arXiv Front for a number of subject areas, using Google Reader. This is great, but there is one problem: when a new preprint is listed in several subject categories, it gets listed in several feeds, which means I have to spend more time reading through the lists of new items, and due to my slightly dysfunctional memory, I often download the same preprint twice. Is there a way to get around this problem, by somehow merging the feeds, using a different arXiv site, or using some other clever trick?
(Hope this is not too off-topic, I think a good answer could be useful to a number of mathematicians. Also, I would like to tag this "arxiv" but am not allowed to add new tags.)

REPLY [2 votes]: I wrote a BASH script for automated downloading of selected arXiv RSS feeds.
That content is deduplicated, then parsed into one of two documents:

keyword-matched articles of interest;
the remaining articles.

The script can be scheduled to run daily via crontab, or manually executed.
By example, today (Jan 10, 2019) among five arXiv RSS feeds my RSS reader provided 690 entries (including duplicated, cross-posted entries) while my script returned 344 de-duplicated (unique) articles.

script | files: https://github.com/victoriastuart/arxiv-rss
accompanying research blog post: https://persagen.com/2019/06/10/arxiv-rss.html