I Looking for the spectrum of equilateral drums

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The discussion focuses on the search for frequency formulas related to hexagonal drums and equilateral triangles, as the user has already found information for half square triangles and rectangles. There is a specific interest in obtaining these formulas under Dirichlet and Neumann boundary conditions. The lack of existing resources on this topic is highlighted, indicating a gap in available research. Participants are encouraged to share any relevant findings or insights. The conversation aims to expand knowledge in the area of equilateral drum frequencies.
Heidi
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Hi Pfs,
I found the formulas for the frequencies of half square triangles, and rectangles.
But nothing on hexagonal drums or equilateral triangles.
(it would nice to get them with Dirichlet and Neumann bordery conditions)
thanks
 

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