Plaza de Espana

As we do with most of our guests, we went over to the Plaza de Espana with Marge today. It is an impressive building and grounds. I don't really get tired of it. On this tree on the way in hung a sign that said "Te doy oxigeno y sombra, cuidame."

Translated, it says, "I give you oxygen and shade, care for me." The air was clear and dry--a good day for photographs:

After the Plaza, we walked through the nearby Parque de Maria Luisa. Here are a couple of the new ducks:

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I finished up implementing some new, better, more general notation in my paper. I also have an idea on how to simplify the currently very long proof near the end of the paper. Laura's comments have made the paper better. Today I feel good about its chances of getting accepted.