The first author of sci papers is the person who has made the greatest contribution to the experiment and writing articles. Refers to the person whose signature ranks first in the author column. But when many people cooperate, it is easy to be like the first author. As for the number of * * * with the first author, there is no clear regulation, which has a lot to do with the workload and length of the paper, the regulations on publishing publications and the recognition of the unit.
A paper with a heavy workload needs the participation and cooperation of adults in the process of experiment, investigation, data collection and writing. There will be many people who contribute the most, but it is impossible to distinguish who contributes the most, that is, the same first author.
As for the number of people, it is difficult to define. It can be said that as long as you arrange the number of first authors, the publications allow and the unit approves, there is no problem at all.
In fact, only one first author is the best for an sci paper, but it is hard to avoid the same situation as the first author. However, we should remember that the number of first authors should not be too large. Too many people will make the position of first author lose its due value.
Publish sci papers in top journals or journals with high impact factors, and suggest the first author to sign. If your published sci paper is the same as the first author, communicate with other authors, magazines and units for confirmation before signing, and make corresponding marks when signing, so as not to affect the publication of sci paper due to the signing problem.