President Donald Trump on Wednesday announced sweeping tariffs on imports of goods from around the globe. Two countries, Canada and Mexico, were notably spared from the latest round of tariffs. But ...
Abstract. We investigate a new graph invariant named reciprocal product–degree distance, defined as: R D D ∗ = ∑ { u , v } ⊆ V ( G ) u ≠v deg ( u ) ⋅ deg ...
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