Some Matrix Iterations for Computing Matrix Sign Function

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td align="left">Methods</td><td align="center">Newton</td><td align="center">Halley</td><td align="center">PM1</td><td align="center">PM2</td></tr><tr><td align="center" colspan="5"><hr/></td></tr><tr><td align="left"> Number of iterations</td><td align="center">21</td><td align="center">14</td><td align="center">18</td><td align="center">9</td></tr><tr><td align="left">Time</td><td align="center">6.68</td><td align="center">7.53</td><td align="center">14.12</td><td align="center">7.02</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Results of comparisons for Example <a href="https://static.hindawi.com/articles/jam/volume-2014/425654/figures/#ex4.1">1</a>.

Journal of Applied Mathematics

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Table 1

Table 1: Some Matrix Iterations for Computing Matrix Sign Function 