Illumination problems are a class of mathematical problems that study the illumination of rooms with mirrored walls by point light sources. == Original formulation == The original formulation was attributed to Ernst Straus in the 1950s and has been resolved.
Illumination problems are a class of mathematical problems that study the illumination of rooms with mirrored walls by point light sources. == Original formulation == The original formulation was attributed to Ernst Straus in the 1950s and has been resolved.
Source: Wikipedia "Illumination problem" · CC BY-SA 4.0
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