Mathematics

arXiv e-Print Archive - is a free distribution service and an open-access archive for 1,872,762 scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. Materials on this site are not peer-reviewed by arXiv.

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Advances in Theoretical and Mathematical Physics - a bimonthly publication of the International Press, publishing papers on all areas in which theoretical physics and mathematics interact with each other.

 

zbMATH - is an excellent database for finding documents, authors, and journals related to mathematics. Some of them are freely available, while others require payment.