ZFC vs NBG: A Comparison of Mathematical Axiom Systems

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ZFC and NBG are both mathematical axiom systems that can prove the same theorems, making the choice between them largely subjective. The discussion emphasizes that neither system is inherently better or preferable, as their utility depends on context rather than personal preference. Some participants humorously mention personal biases, like aesthetic preferences, but these do not impact the mathematical validity of either system. Ultimately, the consensus is that the differences between ZFC and NBG are not significant enough to warrant a strong preference. The focus remains on their equivalence in mathematical proofs rather than individual opinions.
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Which one do you prefer? Which do you think is better?
 
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Neither one is better than the other, nor is one preferable to the other.
 
Er...ZFC, because it matches my curtains.
This doesn't really strike me as a "preference issue". You can prove the same things in both, so, as a fan of mathematics, I really see no reason to pick a side, since it's unlikely that I'll ever encounter a level of argument "low" enough that the difference is relevant.
 
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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