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Isolated steady solutions of the 3D Euler equations. [PDF]

open access: yesProc Natl Acad Sci U S A
Enciso A, Kepplinger W, Peralta-Salas D.
europepmc   +1 more source

Discrete Mathematics Fundamentals [PDF]

open access: possible, 1997
A graph (undirected) can be defined as a pair (V, E) where V is a non-empty finite set and E is a family of distinct unordered pairs of distinct elements of V. Elements of V are called vertices and elements of E are called edges. A graph is normally represented schematically as points and lines joining some of these points.
V. Feinberg, A. Levin, E. Rabinovich
openaire   +1 more source

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