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2. Karp's 21 NP-complete problems - Wikipedia

   en.wikipedia.org/wiki/Karp's_21_NP-complete_problems

   In computational complexity theory, Karp's 21 NP-complete problems are a set of computational problems which are NP-complete.In his 1972 paper, "Reducibility Among Combinatorial Problems", [1] Richard Karp used Stephen Cook's 1971 theorem that the boolean satisfiability problem is NP-complete [2] (also called the Cook-Levin theorem) to show that there is a polynomial time many-one reduction ...

3. Steiner tree problem - Wikipedia

   en.wikipedia.org/wiki/Steiner_tree_problem

   Steiner trees have been extensively studied in the context of weighted graphs. The prototype is, arguably, the Steiner tree problem in graphs. Let G = (V, E) be an undirected graph with non-negative edge weights c and let S ⊆ V be a subset of vertices, called terminals. A Steiner tree is a tree in G that spans S.

4. Rectilinear Steiner tree - Wikipedia

   en.wikipedia.org/wiki/Rectilinear_Steiner_tree

   The single-trunk Steiner tree is a tree that consists of a single horizontal segment and some vertical segments. A minimum single-trunk Steiner tree (MSTST) may be found in O ( n log n ) time. However simply finding all its edges requires linear time .

5. Cow–calf operation - Wikipedia

   en.wikipedia.org/wiki/Cow–calf_operation

   Sale prices for calves sold from a cow–calf operation are subject to fluctuation as part of the cattle cycle of financial markets. [12] The relatively long period it takes a cow–calf operator to build up a beef herd and raise new calves to the desired weight tends to extend the length of such a cycle.

6. Food-feed system - Wikipedia

   en.wikipedia.org/wiki/Food-feed_system

   A food-feed system is an integrated livestock-crop production system where crops grown on farms are harvested for human consumption and the crop-residues or by-products are used as feed for livestock.

7. Ivanka Trump has blunt 3-word response when asked why she won ...

   www.aol.com/ivanka-trump-blunt-3-word-133757599.html

   Ivanka Trump has zero plans of returning the White House to help her father run the country during his second administration, bluntly declaring: “I hate politics.” President-elect Donald Trump ...

8. Talk:Steiner tree problem - Wikipedia

   en.wikipedia.org/wiki/Talk:Steiner_tree_problem

   The Steiner tree in graphs is not a generalisation but in fact a special case of the Steiner tree problem: The general case allows inclusion of Steiner points from a metric space (in the Euclidean case even a continuum), whereas the Steiner tree in graphs only from a weighted graph. A metric space with infinitely many points is not a graph, though.

9. 6 tips to reduce alcohol use and cancer risk after surgeon ...

   www.aol.com/6-tips-reduce-alcohol-cancer...

   U.S. Surgeon General Dr. Vivek Murthy warned in a recent advisory about alcohol use increasing cancer risk. The advisory notes that alcohol can increase the risk of throat, liver, esophageal ...