output
20042025
most cited4MOST - 4-metre Multi-Object Spectroscopic Telescope

196 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing 2014Show all

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math.SP2014★ 6 cited

Nodal domains in the square---the Neumann case

Bernard Helffer, Mikael Persson Sundqvist

Å Pleijel has proved that in the case of the Laplacian on the square with Neumann condition, the equality in the Courant nodal theorem (Courant sharp situation) can only be true fo…