Distance between two vertices
The distance between two vertices x and y of a graph, denoted d(x,y), is the length of the shortest path joining x and y.
Prove of not prove: If x y, z are vertices of graph G, the d(x,y)+d(y,z)>=d(x,z).
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Find out the number of non negative solutions that obey both of the following two equalities:
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Let V be a non-trivial finite-dimensional vector space and let T: V --> V be a linear transformation with T^2 = 0. Is it possible that a T is one-to-one? If yes, give an example and if no, then explain why.
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A scientist determines that the mean nitrogen dioxide level in Calgary is greater than 32 parts per billion. You're asked to test this estimate, so ou find out the nitrogen dioxide levels for 34 randomly chosen days. The results, in parts for each
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