نوشتجات ریاضی، فیزیک و کیهانشناسی

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Cosmology	کیهانشناسی
Mathematics	ریاضیات

Mathematics Sources:

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Wolfram Mathworld
NIST Digital Library of Mathematical Functions
Mathematics Stack Exchange
S.O.S. MATHematics
Encyclopedia of Mathematics
IMU (International Mathematical Union)
Paul's Online Math Notes
Events on European Mathematics Society
Cut The Knot
Department of Mathematics and Computer Science of EMORY


Mathematical Onlines:

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WolframAlpha
Integral Calculator
Symbolab: Indefinite Integral Calculator
Desmos Calculator Example 1
Desmos Calculator Example 2
MIT Open Course Ware


Societies:

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AMS
MAA (Mathematical Association of America)
Leibnitiana


Books and Papers Sites:

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arXiv
Genesis (libgen)
Z-Library
FreeBookCentre.net
Internet Archive
Booksee
E-Books Directory
JournalTOCs
AMS
Bookboon
doab
Ketabnak
Islamic Books


Useful links:

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Detexify LaTeX
isaac Physics
Physics at StackExchange
Scholarpedia
Ganjoor (Iranian poets)
Centre for the Great Islamic Encyclopaedia