Basic Axioms
Axiom 2.1: The time required to fetch an operand from memory is constant, Tfetch, and the time required to store a result in memory is a constant, Tstore.
Axiom 2.2 : The times required to perform elementary arithmetic, such addition, subtraction, multiplication, division, and comparison, are all constants. These times are denoted by T+, T-, Tx, T/ and T<.