Rhombic tiling, permutation plot, subset gamegraph, permutahedron, hyperplane arrangement, structure diagram, three-dimensional heap, Cayley diagram, braid graph, and L-tromino tiling.
  2. Blogging
  3. Nov 7, 2012

Chinese proverb

The gem cannot be polished without friction, nor man perfected without trials.

Chinese proverb

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