To: Modest,
Quoting Modest:
Quote:
Assuming you mean “better-defined domain”, the answer is neither.
So long as you keep track of the domain of each variable while you’re doing arithmetic,
the domain is always perfectly defined.
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Sorry Modest. You are a very smart person, but this time, you assumed incorrectly.
I said absolutely nothing about "better defined domains".
The question was:
Quoting myself:
Quote:
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Which term has the better defined variables?
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That means the symbols:

and

.
You know, when I was a taxi driver

, each and every taxi in the fleet
had its own unique number painted on its sides.
Thus, there was a "one to one corespondence" between the names of the drivers,
and the numbers on the taxis that they drove.
The dispatcher almost always referred to us by the numbers on our taxis,
but in principle, names and numbers were "interchangeable".
The same basic principle applies here.
You see, "Blazys terms" are the only basic (one exponentiation, one multiplication)
terms in mathematics that allow us to refer to each and every variable by it's domain.
(That's one of the things that makes them so absolutely incredible!)
For instance, if we write the "Blazys term":
whose variables are both intrinsically and perfectly defined by their own unique domains as:

,

and
then I can say "Consider the variable whose domain is

,
and immediately, everybody knows that I am referring to the variable

.
However, if we "simplify" the above term so that it appears as:
whose variables are intrinsically defined as:
then we can no longer refer to each and every variable by it's domain!
Thus, if I were now to say "Consider the variable whose domain is

,
then nobody would know which variable I am referring to because all three variables
are now abysmally defined by the same exact domain!
Confusion would abound,

and this would lead to both anger and frustration.

Then, quite possibly, a fight would ensue,

and somebody would get badly injured, or even killed!
Now, there are many ways to restrict the domains of variables.
The important thing however, is that we restrict them in a way that makes sense.
For instance, non-trivial common factors are, by definition, greater than unity,
so for problems that involve common factors,
it makes perfect sense to use "Blazys terms" rather than "terms with poorly defined variables"
because only "Blazys terms" have the restriction

.
"Terms with poorly defined variables" actually allow trivial common factors to creep in,
and are therefore completely inadequate for use in problems that involve common factors.
Most importantly, once a logical restriction is complete, we must not tamper with it
for it constitutes an important and irrevocable logical statement.
Notice how you had to increase the domains of the variables in the "Blazys term" before
you could "cancel out" (meaning "cross out" and "render invisible") the cancelled

's.
When you did that, you changed my logical statement that says:
"This term guarantees that

and will not allow trivial common factors."
into your own illogical statement that says:
"This term does not guarantee that

and will allow trivial common
factors."
Try eliminating the

's in the "Blazys term" equation:
without increasing the domains of the variables!
If you do, then you will find that it's quite impossible!
Thus, the answers to the questions are as follows:
(1) Which term has the better defined variables?
Correct answer: "The Blazys term".
(2) Is it logical to proceed from perfectly defined variables to poorly defined variables
and call it a "simplification"?
Correct answer: "No".
(3) Can the cancelled

's on both sides of the equation be "cancelled out"
meaning "crossed out" and made to "disappear"?
Correct answer: "No".
Quoting Modest:
Quote:
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Nothing about this constrains x against being any real number.
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This tread is about non-negative integers only.
Quoting Modest:
Quote:
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Like I said before, I’m not a mathematician.
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Well, judging by the vigor and tenacity with which you engage in the pursuit of mathematical truth, you certainly have the heart of one!
Don.