Demo of Delta-Epsilon definition for a discontinous F.

Graphical display is given for the limit of a function at a point. This applet allows you to change the epsilon and delta to attempt to fit function values with a epsilon band about the proposed limit value and all displayed graphically. The function is discontinuous at a.
Move the epsilon slider to establish a band (blue) about the proposed imit L_1. Move the epsilon slider to try to get all the output (pink) within the blue band.