{V}\mathbf{i}</annotation></semantics></math></p>
<p><math display="block" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>ùõà</mi><mo>=</mo><msup><mover><mrow><msup><mi>ùêî</mi><mi mathvariant="normal">T</mi></msup><mi>ùê¢</mi></mrow><mo accent="true">ÃÇ</mo></mover><mrow><mi mathvariant="normal">‚àí</mi><mn>1</mn></mrow></msup><mi>ùê†</mi></mrow><annotation encoding="application/x-tex">\mathbf{\eta} = \widehat{\mathbf{U}^\mathrm{T} \mathbf{i}}^{\mathrm{-}1} \