It is believed that the crystallographer who explicitly described the network structure of the K4 crystal for the first time is Fritz Laves(1932).
•
Among his numerous contributions, the most famous one is a general construction of isospectral manifolds (1985), which is based on his geometric model of number theory, and is considered to be a breakthrough in the problem proposed by Mark Kac in "Can one hear the shape of a drum?" (see Hearing the shape of a drum).