The meaning of arXiv is as follows: arXiv is a website that collects preprints of papers in physics, mathematics, computer science and biology.

The difference between the preprint and the postprint is called the correction or correction (Corrigenda). Therefore, the preprint plus the correction is equivalent to the postprint, that is, Preprint + Corrigenda = Postprint.

Some publishers do not allow authors to archive postprints. Authors can store the preprint of the paper first and then add errata after the paper is officially published, that is, the open archiving model of preprint plus revised version.

Preprints and postprints: The main difference between preprints and postprints is whether they have been tested by the peer review system.

A preprint refers to any version before peer review and publication, usually the version when submitted to a journal; a postprint refers to any version after peer review.

Sometimes postprints can be divided into two types: (1) Refers to the version that has been peer-reviewed but has not yet been edited.

(2) Refers to the version that has been peer-reviewed and edited.

Some journals allow authors to store the first type of postprint in an open access repository, but not the second type of postprint.