摘要：The h- index has received wide attention in recent years. The area under the citation function is divided by the h- index into three parts, representing h- squared, excess and h- tail citations. The h- index by itself does not carry information for excess and h- tail citations, which can play an even more dominant role than h- index in determining the citation curve, and therefore it is necessary to examine the relations among them. A triangle mapping technique is proposed here to map the three percentages of these citations onto a point within a regular triangle. By viewing the distribution of mapping points, shapes of the citation functions can be studied in a perceivable form. As an example, the distribution of the mapping points for 100 most prolific economists is studied by this technique.
