Method of successive substitution Method of successive substitution In modular arithmetic, the method of successive substitution is a method of solving problems of simultaneous congruences by using the definition of the congruence equation. It is commonly applied in cases where the conditions of the Chinese remainder theorem are not satisfied. There is also an unrelated numerical-analysis method of successive substitution, a randomized algorithm used for root finding, an application of fixed-point iteration. The method of successive substitution is also known as back substitution. Consider the simple set of simultaneous congruences Now, for "x" ≡ 3 (mod 4) to be true, "x" = 3 +
28th Chess Olympiad 28th Chess Olympiad The 28th Chess Olympiad, organized by FIDE and comprising an open and a women's tournament, as well as several other events designed to promote the game of chess, took place between November 12 and November 30, 1988, in Thessaloniki, Greece. After the successful 26th Olympiad in Thessaloniki in 1984, FIDE had agreed to hold every other Olympiad (the ones in Olympic years) in the home country of the Olympic movement - provided the Greek Chess Federation and government could provide the necessary funding. This was only the case once, in 1986; after that the Olympiad went back