Terms in a Mathematical Expression

gwsinger
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When we refer to terms in an equation, what EXACTLY are we referring to? Suppose for example we have:

ab + bc + cd = A

Suppose somebody refers to term "ab". Are they referring to the syntactical NAME "ab", the IMAGE of ab (i.e., it's value), or the ARGUMENT (a,b) which belongs to some ordered triplet in the multiplication function?
 
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Do you mean the ordered triplet in the addition function? Yes, I believe that's it.
 
gwsinger said:
When we refer to terms in an equation, what EXACTLY are we referring to?

I don't think there is any general rule for this. It depends on the context. It's a matter of interpreting English unless you are studying a text that is using such terminology to describe the precise syntax of a symbolic language.

For example, one might just as well ask "Who is the 'we' that you refer to?" or "EXACTLY what particular passages of text are you talking about?".
 
In high school algebra II, we're taught that a term is an expression that is being added to another. In your example, you would have three terms: ab, bc, and cd.
 
A "term" is not a formal mathematical object, it's just a word that's used for conveying a point. It can mean any of the three things you mentioned, and it's still (mathematically) unambiguous, because two of the three are the same (the value and the argument to the operation, since the value is what is actually being used as an argument) and the other one (the name) has no bearing on the mathematical value of the sentence.
 
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The following is more or less taken from page 6 of C. Smorynski's "Self-Reference and Modal Logic". (Springer, 1985) (I couldn't get raised brackets to indicate codification (Gödel numbering), so I use a box. The overline is assigning a name. The detail I would like clarification on is in the second step in the last line, where we have an m-overlined, and we substitute the expression for m. Are we saying that the name of a coded term is the same as the coded term? Thanks in advance.
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