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I have trying to study independently some fairly high level physics but I keep getting bogged down with simple (I imagine for other people) mathematics terms:

Here is a partial list of terms I don't get:

Operator

Argument

Mapping

Comutator

There are probably many others. My question is where can I find simple definition of these terms in everyday speak and not full-blown mathematical language?

For example to try to understand the term operator, I went to Wikipedia but unfortunately as is often the case I just go round in circles because each definition relies on using other terms like mapping and vector space and when I try to look up the meanings of those I end up back where I started. So I am looking for a source that gives everyday explanations of mathematics terms for real dummies. Thanks