Science books

The vision of moving to our new house in a couple of months motivates me to get rid of unnecessary things. This weekend I was reviewing bookshelves. Removed 5 boxes of old notebooks, and other papers from my university times. Identified 4 big piles of #books I don't need anymore. Those here are almost antiques, older than me but of course still actual. After all, the theory of #mathematics does not change that often.