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Century-old problem solved with first-ever 3D atomic imaging of an amorphous solid（图）
Century-old problem solved first-ever 3D atomic imaging amorphous solid
2021/4/16
Glass, rubber and plastics all belong to a class of matter called amorphous solids. In spite of how common they are in our everyday lives, amorphous solids have long posed a challenge to scientists.Si...
We determine the worst case information rate for all secret sharing schemes based on trees.
It is the inverse of 2 1=c, where c is the size of the maximal core in the tree. A core is a con...
My first reaction on reading this question -- which was pencilled on a sheet of notebook paper -- was "mathematical problems are never solved." Due to my limited stay at the camp, I didn't have the...