You can always try emailing him at hn@yombinator.com . But I'm not sure whether he will accept.
Remember that it will be manual process so if everyone and their dog send a rectification, it will be too much work and he will hate me. Try this only if you extremely dislike the application that you upvoted by mistake.
Remember that it will be manual process so if everyone and their dog send a rectification, it will be too much work and he will hate me. Try this only if you extremely dislike the application that you upvoted by mistake.