open polyhedron
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Császár polyhedron — An animation of the Császár polyhedron being rotated and unfolded. Type Toroidal polyhedron Faces 14 triangles Edges 21 Verti … Wikipedia
Net (polyhedron) — Net of a dodecahedron When the Earth is mappe … Wikipedia
Waterman polyhedron — Waterman polyhedra were invented, around 1990, by Steve Waterman.The Waterman polyhedra are created by packing spheres according cubic close(st) packing (CCP) and sweep away spheres that are farther from the center than a defined radius, the… … Wikipedia
Duality (mathematics) — In mathematics, a duality, generally speaking, translates concepts, theorems or mathematical structures into other concepts, theorems or structures, in a one to one fashion, often (but not always) by means of an involution operation: if the dual… … Wikipedia
Linear programming — (LP, or linear optimization) is a mathematical method for determining a way to achieve the best outcome (such as maximum profit or lowest cost) in a given mathematical model for some list of requirements represented as linear relationships.… … Wikipedia
combinatorics — /keuhm buy neuh tawr iks, tor , kom beuh /, n. (used with singular v.) See combinatorial analysis. * * * Branch of mathematics concerned with the selection, arrangement, and combination of objects chosen from a finite set. The number of possible… … Universalium
List of Dungeons & Dragons modules — A module in Dungeons Dragons is an adventure published by TSR, the term is usually applied to adventures published for all Dungeons Dragons games before 3rd Edition. For 3rd Edition and beyond new publisher Wizards of the Coast uses the term… … Wikipedia
Crystal structure of boron-rich metal borides — Two single crystals of YB66 (1 cm diameter) grown by floating zone technique using (100) oriented seeds. In the top crystal, the seed (left from the black line) has same diameter as the crystal. In the bottom crystal (sliced), the seed is much… … Wikipedia
Polyhedral skeletal electron pair theory — In chemistry the polyhedral skeletal electron pair theory provides electron counting rules useful for predicting the structures of clusters such as borane and carborane clusters. The electron counting rules were originally formulated by Kenneth… … Wikipedia
Dungeon (magazine) — Dungeon Adventures Into the Fire by Keith Parkinson Cover of Dungeon Adventures Issue 1 Dated September 1986 Editor … Wikipedia
borane — /bawr ayn, bohr /, n. Chem. any of the compounds, both neutral and anionic, of boron and hydrogen with formulas ranging from B2H6 to B20H16. Also called boron hydride. [ < G Boran (1916); see BORON, ANE] * * * ▪ chemical compound Introduction… … Universalium
