The uniqueness of a certain generalized octagon of order <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si151.gif" display="inline" overflow="scroll"><mml:mrow><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>,</mml:mo><mml:mn>4</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
Discrete mathematics