• Conferences
• International Mathematical Organizations
• Mathematical Networks
• Mathematical Journals
• Mathematical Institutions
• Mathematical Libraries
• International Scientific Foundations
• Miscellaneous Links

Conferences

• Calendar of Conferences on All-Russian Mathematical Portal - http://www.mathnet.ru/php/conference.phtml?&option_lang=eng
• COMS: Calendar of upcoming scientific conferences - http://www.conference-service.com/conferences/mathematics.html
• Conferences & Workshops by European Mathematical Society - http://www.euro-math-soc.eu/event-list
• Mathematics Calendar - http://www.ams.org/mathcal/

International Online Conference Algebraic and Geometric Methods of Analysis May 25-28, 2021 https://www.imath.kiev.ua/~topology/conf/agma2021/contents/index.php

10th International Conference on Mathematical Modeling in Physical Sciences September 6-9, 2021 https://www.icmsquare.net/

Approximation Theory and Numerical Analysis

• Amos Ron's list of people affiliated with Approximation Theory - http://pages.cs.wisc.edu/~amos/atpeople.html
• History of Approximation Theory Homepage - http://www.math.technion.ac.il/hat/
• LdeApprox - The Analytical Approximations package - http://www.digi-area.com/Maple/LdeApprox/
• New Zealand Approximation Theory Group - https://www.math.auckland.ac.nz/~waldron/NZATG/
• Numerical Analysis and Scientific Computing Group. Department of Computer Science. University of Toronto - http://www.cs.toronto.edu/NA/
• Numerical Approximation and Linear Algebra Group (NALAG)- http://nalag.cs.kuleuven.be/
• Research Group "Approximation Theory and Orthogonal Polynomials" - http://www.ual.es/GruposInv/Tapo/index_en.html
• Research Group in Mathematical Inequalities and Applications (RGMIA) - http://rgmia.org/index.php
• SIAM Activity Group on Orthogonal Polynomials and Special Functions - http://math.nist.gov/opsf/
• Surveys in Approximation Theory - http://www.math.technion.ac.il/sat/

International Mathematical Organizations

• American Mathematical Society - http://www.ams.org/
• Australian Mathematics Society - http://www.austms.org.au/
• Belgian Mathematical Society - http://bms.ulb.ac.be/cgi/welcome.php
• Canadian Mathematics Society - http://camel.math.ca/
• Deutsche Mathematiker-Vereinigung (DMV) - http://www.mathematik.uni-bielefeld.de/DMV/
• Edinburgh Mathematical Society - http://www.maths.ed.ac.uk/~edmathsoc/
• European Mathematical Society - http://www.euro-math-soc.eu/
• International Mathematical Union (IMU) - http://www.mathunion.org/
• Kharkiv Mathematical Society - http://kms.univer.kharkov.ua/
• Kiev Mathematical Society - http://www.mathsociety.kiev.ua/
• London Mathematical Society - http://www.lms.ac.uk/
• Mathematical Assosiation of America - http://www.maa.org/
• Moscow Mathematical Society - http://mms.math-net.ru/
• National Academy of Science (USA) - http://www.nas.edu/
• New Zealand Mathematical Society - http://nzmathsoc.org.nz/
• Die Osterreichische Akademie der Wissenschaften - http://www.oeaw.ac.at/
• Russian Academy of Sciences (Mathematics) -
  http://www.ras.ru/win/db/show_org.asp?P=.oi-50.vi-.fi-.oi-51
• Sanct-Petersburg Mathematical Society - http://www.mathsoc.spb.ru/rus/
• Society for Industrial and Applied Mathematics (SIAM) - http://www.siam.org/
• Societe Mathematique de France - http://smf.emath.fr/
• Unione Matematica Italiana - http://umi.dm.unibo.it/
• Ukrainian Mathematical Society - https://sites.google.com/site/ukrainianmathsociety/
• Workshops of the Lviv Mathematical Society - http://seminar.mathlviv.org.ua/

Mathematical Networks

• All-Russian Mathematical Portal - http://www.mathnet.ru/
• Math Database (Zentralblatt Math.1931 - ) - http://www.emis.de/ZMATH/
• MathSciNet Homepage (Mathematical Reviews) - http://www.ams.org/mathscinet/
• Number Theory Web - http://www.numbertheory.org/ntw/

Mathematical Journals

• Advances in Computational Mathematics - http://worldsciencepublisher.org/journals/index.php/ACMA
• Applied and Computational Harmonic Analysis - http://www.journals.elsevier.com/applied-and-computational-harmonic-analysis/
• Computational Methods and Function Theory - http://www.cmft.de/
• Constructive Approximation - http://www.math.vanderbilt.edu/~ca/
• East Journal of Approximation - http://www.darba-eja.com/
• Electronic Transactions on Numerical Analysis - http://etna.mcs.kent.edu/
• Indagationes Mathematicae - http://www.journals.elsevier.com/indagationes-mathematicae/
• International Journal of Pure and Applied Mathematics - http://www.ijpam.eu/
• Izvestia RAN (Mathematics) - http://math.ras.ru/Izvestiya_RAN/
• Journal of Approximation Theory - http://www.journals.elsevier.com/journal-of-approximation-theory/
• Journal of Computational and Applied Mathematics - http://ees.elsevier.com/cam/
• Journal of Computational and Applied Mathematics (Ukraine) - http://opmj.univ.kiev.ua/
• Matematychni Studii - http://matstud.org.ua/index.php/MatStud
• Mathematical Methods and Physical Mechanical Fields - http://www.iapmm.lviv.ua/journal_ua.html
• Mathematical Physics. Analysis. Geometry - http://jmagr.ilt.kharkov.ua/mag_r.html
• Mathematical Sbornik - http://math.ras.ru/Mat._sbornik/
• Mathematical Zametki - http://math.ras.ru/Mat._zametki/
• Mathematics of Computation - http://www.ams.org/publications/
• Moscow Mathematical Journal - http://www.ams.org/distribution/mmj/
• Nonlinear Oscillations - http://www.imath.kiev.ua/~nosc/web/index.php
• Numerical Algorithms - http://www.springer.com/computer/theoretical+computer+science/journal/11075
• Pacific Journal of Mathematics - http://msp.org/pjm/about/journal/editorial.html
• Rocky Mountain Journal of Mathematics - http://rmmc.asu.edu/rmj/rmj.html
• Serdica Mathematical Journal - http://www.math.bas.bg/serdica/
• Siberian Mathematical Journal - http://a-server.math.nsc.ru/publishing/smz/index.php
• Ukrainian Mathematical Journal - http://imath.kiev.ua/~umzh/
• Uspekhi Mathematicheskih Nauk - http://math.ras.ru/UMN/
• Vestnik of Moscow University. Mathematics, mechanics - http://mech.math.msu.su/vestnik/
• Some mathematical journals - http://www.jstor.org/jstor/

Mathematical Institutions

• Centre de Physique Theorique (Marseille) - http://www.cpt.univ-mrs.fr/?lang=fr
• EULER International Mathematical Institute (StPeterburg) - http://www.pdmi.ras.ru/EIMI/
• The FIELDS Institute - http://www.fields.utoronto.ca/
• Institute of Applied Mathematics and Mechanics of the National Academy of Sciences of Ukraine - http://www.iamm.in.ua/
• Institute of Applied Problems of Mechanics and Mathematics of the National Academy of Sciences of Ukraine (Lviv) - http://www.iapmm.lviv.ua/
• Institute of Low Temperatures of the National Academy of Sciences of Ukraine (Kharkov) - http://www.ilt.kharkov.ua/
• Institute of Mathematics of National Academy of Sciences of Armenia (Yerevan)- http://math.sci.am/
• Institute of Mathematics of the National Academy of Sciences of Ukraine (Kiev) - http://www.imath.kiev.ua/
• Institute of Mathematics of the Polish Academy of Sciences (Warsaw) - http://www.impan.gov.pl/
• Institute of Mathematics of the Siberian Department of RAS (Novosibirsk) - http://math.nsc.ru/
• Isaac NEWTON Institute for Mathematical Sciences - http://www.newton.cam.ac.uk/
• KELDYSH Institute of Applied Mathematics of RAS (Moscow) - http://www.keldysh.ru/
• Los Alamos National Laboratory - http://www.lanl.gov/index.php
• Mathematical Sciences Research Institute (Berkeley) - http://www.msri.org/
• MITTAG-LEFFLER Institute - http://www.mittag-leffler.se/
• Stefan BANACH International Mathematical Center (Warsaw) - http://www.impan.gov.pl/BC/
• STEKLOV Mathematical Institute of RAS (Moscow) - http://www.mi.ras.ru/
• Transactions of Institute of Mathematics, the NAS of Ukraine - http://trim.imath.kiev.ua/index.php/trim/index

Mathematical Libraries

• DjVu Mathematical Library - http://djvu-lib.narod.ru/index-all.html
• Great Scientific Library - http://sci-lib.com/
• International Digital Electronic Library (IDEAL) - http://www.sciencedirect.com/science/journals/
• Internet Library on Mathematics - http://www.mccme.ru/free-books/ilib.htm
• National Libraries of the World - http://www.publiclibraries.com/world.htm
• SciELO - Scientific Electronic Library Online - http://www.scielo.org/php/index.php?lang=en
• Scientific Literature Digital Library - http://citeseer.ist.psu.edu/
• Sci-Hub - service of access to scientific literature - https://sci-hub.la/

International Scientific Foundations

• Civilian Research and Development Foundation (CRDF) - http://www.crdf.org/
• International Renaissance Foundation - http://www.irf.kiev.ua/
• National Science Foundation - http://www.nsf.gov/home/mps/start.html
• NATO Scientific & Environmental Affairs - http://www.nato.int/science/

Miscellaneous Links

• 2010 Mathematical Subject Classification - http://www.ams.org/msc/
• The Abel Prize - http://www.abelprisen.no/en/
• Association Bourbaki - http://www.bourbaki.ens.fr/
• Certified Staff Evaluation Department of Ministry of Science and Education of Ukraine - http://old.mon.gov.ua/ua/department/atest/
• Clay Mathematics Institute Millennium Problems - http://www.claymath.org/millennium/
• Collection of Annotated Links - http://zbornik.narod.ru/
• The Digital Library of Mathematical Functions - http://dlmf.nist.gov/
• EqWorld: The World of Mathematical Equations - http://eqworld.ipmnet.ru/
• Explanatory Dictionary on the Theory of the Graphs - http://pco.iis.nsk.su/grapp/index.html
• Electronic World Directory of Mathematicians (EWDM) - http://www.mathunion.org/ewdm/
• Ethimology of Mathematical Terhminology - http://etimologi-term.narod.ru/
• Free Net Community «Dissernet» - http://www.dissernet.org/
• A Gallery of Interactive On-Line Geometry - http://www.geom.uiuc.edu/apps/gallery.html
• The Glossary of Mathematical Mistakes - http://www.mathmistakes.com/
• The MacTutor History of Mathematics Archieve - http://www-history.mcs.st-and.ac.uk/
• Mathematical Constants (by Steven R. Finch)- http://www.people.fas.harvard.edu/~sfinch/
• Mathematical Fiction Homepage - http://kasmana.people.cofc.edu/MATHFICT/
• Mathematical Portal "Matematiku.ru" - http://matematiku.ru/
• Mathematical Quotations Server - http://math.furman.edu/~mwoodard/mquot.html
• Mathematical Web Sites around the World (Penn State Mathematics Department) - http://www.math.psu.edu/MathLists/Contents.html
• Mathematics Genealogy Project - http://genealogy.math.ndsu.nodak.edu/
• Mathematics of Planet Earth 2013 - http://mpe2013.org/
• MathForum.Ru - Mathematical Forum of the Mechanical and Mathematical Department of Moscow University - http://www.mathforum.ru/
• MATHWORLD: the web's most extensive mathematics resourse - http://mathworld.wolfram.com/
• Ministry of Science and Education of Ukraine - http://www.mon.gov.ua/
• Moscow Center for Continuous Mathematical Education - http://www.mccme.ru/
• "POISK" - weekly newspaper of scientific community - http://www.poisknews.ru/
• PostNauka - all You want to know about science, but don't know who to ask - http://postnauka.ru/
• Proofs.Wiki Free, community-based web resource dedicated to collecting and providing rigorous definitions, proofs and theorems in all of mathematics, physics, chemistry, computer science and biology - http://proofs.wiki/
• Ukrainian Scientists Worldwide - http://www.usw.com.ua/
• The World of Pi - http://www.pi314.net/eng/index.php