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In school , Sharp also showed a talent for art . " The spinach contamination may have had a spillover effect to other produce items , " said Ed Mackowiak , vice president of sales for FreshLook Marketing . And so I appreciate you inviting the head of the Republic Party . Ramsey theory goes further by proving the existence of highly regular mathematical patterns among sets of integers and other mathematical objects . The head of the Government Accountability Office , the nonpartisan investigative arm of the Congress , and the department 's own inspector general said Homeland Security officials , particularly lawyers in the general counsel 's office , had delayed probes and demanded inappropriate access to interviews with employees . At the same time , Dirac was strongly motivated by principles of mathematical beauty .