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" Ever gracious , she even traveled out to Columbus to participate in the plaque 's dedication ceremony on a special , but poignant day for her - - the couple 's 41st wedding anniversary " This is a little sad for me , " she acknowledged . OSUWeb.net is run by the university as an alternative to homenet . With this tool of cell decomposition we can classify the Presburger sets up to Presburger-definable bijection : there exists a definable bijection between two infinite Presburger sets if and only if their dimension is equal . Web sites that show an understanding of their audience and provide the content and services targeted to the audience are much more likely to succeed than sites that focus on design or innovations , to the exclusion of audience and content . This easy to state problem turns out to depend on the Birch Swinnerton-Dyer conjecture about elliptic curves , one of the Clay Mathematics Institute 's million dollar Millenium problems . Unlike homenet , you are guaranteed to connect with no busy signals and the modems are higher speed . In honor of his retirement , the department held a picnic and ceremony to celebrate his years of service .