An inverse eigenvalue problem for an arbitrary multiply connected bounded region in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="$R^2 $"><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>
International journal of mathematics and mathematical sciences