TY JOUR TI Short introduction into DMA KW Fuzzy mathematics KW Discrete mathematical analysis KW discontinuous KW anomality KW clusters KW trends KW geophysical monitoring JO Russian Journal of Earth Sciences AU Agayan, S.M. AU Bogoutdinov, S.R. AU Krasnoperov, R.I. PY 2018 IS 18 PB Geophysical Center of the Russian Academy of Sciences