On the other hand, an author with many publications, each with only 1 citation, would also have a h-index of 1.įormally, if f is the function that corresponds to the number of citations for each publication, we compute the h-index as follows: First we order the values of f from the largest to the lowest value. For example, an author with only one publication can have a maximum h-index of 1 (if their publication has 1 or more citations). However, the author does not have four publications with 4 or more citations.Ĭlearly, an author's h-index can only be as great as their number of publications. For example, if an author has five publications, with 9, 7, 6, 2, and 1 citations (ordered from greatest to least), then the author's h-index is 3, because the author has three publications with 3 or more citations. The h-index is the largest number h such that h articles have at least h citations each. The index works best when comparing scholars working in the same field, since citation conventions differ widely among different fields. The index is designed to improve upon simpler measures such as the total number of citations or publications.

The h-index is defined as the maximum value of h such that the given author/journal has published at least h papers that have each been cited at least h times. H-index from a plot of numbers of citations for an author's numbered papers (arranged in decreasing order)

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