Each year the American Mathematical Society liaises with a host society from another country to organize a meeting, linking together members of the mathematical community from the US and abroad. The 2015 meeting will bring together the American Mathematical Society (AMS), the European Mathematical Society (EMS) and the hosting Portuguese Mathematical Society (SPM) in the UNESCO world heritage city of Porto, from which Portugal derives its name. Perched high above the Douro River, the venue is close at hand to local cultural sites and a variety of accommodations. The scientific scope of this meeting ranges from plenary talks of general interest to special sessions focusing on current research in specific areas.