MHB Write this statement using the logical symbols

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The discussion centers on expressing the statement "every integer is a product of two integers" using logical symbols. A proposed solution is presented as "∀ n,o,p E Z, n = o*p E Z," which translates to stating that for all integers n, o, and p, n equals the product of o and p. Participants confirm that this formulation correctly captures the essence of the statement, using specific integer examples to illustrate its validity. The conversation emphasizes the importance of ensuring clarity in logical expressions. Overall, the proposed solution is deemed correct in representing the original statement.
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every integer is a product of two integers.

My Solution:

∀ n,o,p E Z, n = o*p E Z

Is this correct?
 
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WannaBe said:
every integer is a product of two integers.

My Solution:

∀ n,o,p E Z, n = o*p E Z

Is this correct?

Hi WannaBe, welcome to MHB! :)

Let's see...

Your solution reads in English:
for all integers n, o, p holds that n is equal to o times p, which is an integer.​

Suppose we pick n=2, o=2, p=2, which satisfies the condition that they are integers.
Can we say that n = o * p?
 
I was reading documentation about the soundness and completeness of logic formal systems. Consider the following $$\vdash_S \phi$$ where ##S## is the proof-system making part the formal system and ##\phi## is a wff (well formed formula) of the formal language. Note the blank on left of the turnstile symbol ##\vdash_S##, as far as I can tell it actually represents the empty set. So what does it mean ? I guess it actually means ##\phi## is a theorem of the formal system, i.e. there is a...

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