I will remember your gracious hospitality every time I visited your department. You welcomed me as a friend the first time I dropped by 12 years ago. I will remember your sincere kindness throughout the years. It has been a pleasure and an honor for me to solve problems with you, and also to simply chat about life over a fine meal. It is hard to believe we will no longer share notes on where to have dinner around the world, or meet to watch your beloved FC Barcelona during conferences, workshops and visits.