Nice book, my favourite math subject, I recommend start with a more classic book, that explains the fundamentals of topology, starting from its definition. Ther

Nice book, my favourite math subject, I recommend start with a more classic book, that explains the fundamentals of topology, starting from its definition. There are a lot of people talking about "topologic spaces", but, they don't know the definition, so they don't know what are they talking about. Unfortunately happens with a lot of other math concepts, for example a lot of people say "idempotent" but they don't know what does it mean and use the term for things that are not idempotents, hence the word loose its meaning.