If you are looking for specific "Podgotovka k olimpiade" (Olympiad Preparation) materials, these are the highly-rated standards for the Russian mathematical tradition:
Traditional Russian math preparation (MechMat style) emphasizes: Russian Math - Amazon.com
This is the most popular international math competition for this age group. Reviewing past papers is the best way to understand the "tricks" used in competitive math.
If you are looking for specific "Podgotovka k olimpiade" (Olympiad Preparation) materials, these are the highly-rated standards for the Russian mathematical tradition:
Traditional Russian math preparation (MechMat style) emphasizes: Russian Math - Amazon.com
This is the most popular international math competition for this age group. Reviewing past papers is the best way to understand the "tricks" used in competitive math.
DEFCAD, Inc. All rights reversed.
Habent sua fata libelli et balli
DEFCAD files and other hardware are not currently available to persons outside the United States and are not available to residents of and persons in the State of New Jersey who do not possess a federal firearms license.
Since Jan. 1 2021, no warrants have been served to defcad.com principals or employees. No searches or seizures have been performed on defcad.com