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The present paper reports the occurrence of the Chinese mitten crab Eriocheir sinensis H. Milne Edwards, 1854 in the coastal waters of the Gulf of Gdansk, and attempts an initial characterization of the crabs occurring in this area.
We present a linear-time algorithm that, given an n-vertex planar graph G, finds an embedding of G into a (2n - 4) (n - 2) grid such that the edges of G are straight-line segments.
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