This articles provides step-by-step green card process and green card application information for those who want to start their green card processing to become a lawful permanent resident of the United States.
If you lost your green card and can’t find a copy, I guess you can put down “unknown” for class of admission. Hopefully USCIS will be able to process your request with other information you provided. Don’t write H-1B, EB2 or stuff like that. Below is the official Form I-90 ...
as desirable as that would be; some further legislative or judicial action would be needed to begin restoring enough trust in the stability of the US immigration and visa system that the international travel that is so necessary to modern mathematical research becomes “just” a bureaucratic...