Especially for the signature of scientific research papers, each journal has more detailed regulations; However, when the paper signature is used to evaluate professional titles, the weight of the first author is obviously heavier than that of the second and third authors, but lighter than the personal signature.
Due to the complexity and diversity of scientific research, extended data, such as bioinformatics, a paper has hundreds of signatures. The first author refers to the person whose signature ranks first. Some articles have two or more first authors, which are called tied first authors. In this case, it is generally necessary to indicate the name of the person.
In addition, the first author is different from the correspondent and creative contribution, and the correspondent is often the most authoritative person in the field of papers.
Baidu Encyclopedia-First Author