11. This rapidity parameter corresponds to the real variable in a one-parameter group of hyperbolic versors. 12. However, not all real variable taking real values. 13. These are also functions of real variables , such as frequency or time, as well as temperature. 14. Consequently, " f " is not functions of a complex variable rather than of a real variable . 15. The real variable is going to be how many times you eat and how much you eat, 16. The modern ?-? definition of the limit of a function of a real variable is given below. 17. In this case, the function " f " has to be a function of one real variable . 18. For a real-valued function of three or more real variables , this expression extends easily using appropriate rotation matrices. 19. An "'acnode "'is an isolated point in the solution set of a polynomial equation in two real variables . 20. Unlike functions of a real variable , holomorphic functions are sufficiently rigid that their isolated singularities can be completely classified.
