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In mathematics, a binary relation associates elements of one set called the domain with elements of another set called the codomain. [1] Precisely, a binary relation over sets X {\displaystyle X} and Y {\displaystyle Y} is a set of ordered pairs ( x , y ) {\displaystyle (x,y)} where x {\displaystyle x} is in X {\displaystyle X} and y ...
In mathematics, a recurrence relation is an equation according to which the th term of a sequence of numbers is equal to some combination of the previous terms. Often, only previous terms of the sequence appear in the equation, for a parameter that is independent of ; this number is called the order of the relation.
Dan Schueftan was an advisor to Israel's National Security Council [4] and to former prime ministers Yitzhak Rabin [5] and Ariel Sharon. [6]He has served as a consultant to Israeli decision-makers and the top echelon of Israel's foreign policy and defense establishments, also briefing European and American political leaders and senior officers.