ArXiv "now requires first-time posters to be endorsed by an established arXiv author in their own field. People who have previously posted in the same disciplinary section of arXiv do not need an endorsement. The move is an attempt to clamp down on a rising tide of fraudulent submissions, says University of Amsterdam astronomer Ralph Wijers, chair of the arXiv editorial council. A large fraction, he says, are generated with artificial intelligence (AI)."
