<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<!--

Copy and paste this file into a MathML-aware program such as Mathematica or Maple

From Article:
On fuzzy boundary value problems
Minghao Chen, Congxin Wu, Xiaoping Xue and Guoqing Liu
Published in:
Information Sciences
Volume 178, Issue 7, 1 April 2008, Pages 1877-1892
doi: 10.1016/j.ins.2007.11.017
-->

<mml:mrow><mml:msubsup><mml:mrow><mml:mi mathvariant="script">F</mml:mi></mml:mrow><mml:mrow><mml:mi>b</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">st</mml:mi></mml:mrow></mml:msubsup><mml:mo>=</mml:mo><mml:mo stretchy="false">&#x7b;</mml:mo><mml:mi>u</mml:mi><mml:mo stretchy="false">&#x7c;</mml:mo><mml:mi>u</mml:mi><mml:mo>:</mml:mo><mml:mi mathvariant="bold">R</mml:mi><mml:mo>&#x2192;</mml:mo><mml:mi>I</mml:mi><mml:mi>&#x225c;</mml:mi><mml:mo stretchy="false">&#x5b;</mml:mo><mml:mn>0</mml:mn><mml:mtext>,</mml:mtext><mml:mn>1</mml:mn><mml:mo stretchy="false">&#x5d;</mml:mo></mml:mrow></mml:math>