For this reason it is also commonly called Dirichlet's box principle, Dirichlet's drawer principle or simply "Dirichlet principle"--a name that could also refer to the minimum principle for harmonic functions.
For this reason it is also commonly called Dirichlet's box principle or Dirichlet's drawer principle. In Russian and some other languages, it is contracted to simply "Dirichlet principle"--a name that could also refer to the minimum principle for harmonic functions.