MathDB
Miklos Schweitzer 1951_9

Source:

October 8, 2008
modular arithmeticnumber theory proposednumber theory

Problem Statement

Let {m1,m2,} \{m_1,m_2,\dots\} be a (finite or infinite) set of positive integers. Consider the system of congruences (1) x\equiv 2m_i^2 \pmod{2m_i\minus{}1} ( i\equal{}1,2,... ). Give a necessary and sufficient condition for the system (1) to be solvable.