Upper and Lower Bounds for the First Dirichlet Eigenvalue of a Triangle

@inproceedings{Freitas2006UpperAL,
  title={Upper and Lower Bounds for the First Dirichlet Eigenvalue of a Triangle},
  author={Pedro Freitas},
  year={2006}
}
We prove some new upper and lower bounds for the first Dirichlet eigenvalue of a triangle in terms of the lengths of its sides. 

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