The contracting officer is designated as the source selection authority, unless the agency head appoints another individual for a particular acquisition or group of acquisitions. (6) Select the source or sources whose proposal is the best value to the Government (10 U.S.C. 2305(b)(4)(C) and 41 U.S.C. 3703(c)).
In mathematics, a critical point or stationary point of a differentiable function of a real or complex variable is any value in its domain where its derivative is 0. Some authors include in the critical points the limit points where the function may be prolongated by continuity and where the derivative is not defined.
Best Answer: The problem here is not that the limit is undefined, but rather that teh function is multivalued at x = 0. There is a discontinuity at x = 0. There is no asymptote. x/|x| consists of two disconnected lines. That's why the limit at x = 0 does not exist. Just to test it out, work out x/|x| for x = -0.001 and x = +0.001. See what you get. Just as a side note, if you obtained the Fourier series for x/|x|, it would return the value 0 at x = 0.