Mathematicians solved a 'Ramsey' graph problem that's baffled many for decades
                                
                                
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                                    Unless you dabble in advanced math, r(4,t) probably doesn't mean much to you. But to the delight of mathematicians across the globe, researchers cracked this "Ramsey problem," which has baffled great minds for decades.  Phys.org  reports that the findings of University of California San Diego...