An optimal Poincaré inequality for convex domains

@article{Payne1960AnOP,
  title={An optimal Poincar{\'e} inequality for convex domains},
  author={L. Payne and H. Weinberger},
  journal={Archive for Rational Mechanics and Analysis},
  year={1960},
  volume={5},
  pages={286-292}
}

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