Physical Science, Measurement and Instrumentation, Management and Education, IEE Proceedings A

The author comments on the paper 6473A (see ibid., vol.136, no.2, p.49-54). He suggests that although the authors succeed well in conveying the main ideas of algebraic topology which are necessary to understand the mathematical nature of ´cutting surfaces´, they wrongly define cuts as surfaces (with boundary on the conductor) whose removal ´transform the multiply connected (air) region into (a) simply connected one´. The authors of the original article explain the concepts of homology and homotopy and point out that the relevant concept for their purposes is homology and not homotopy.<>