I've started learning about set theory and the book I'm using, in the first couple of paragraphs, isn't quite as detailed and rigorous as I would like it to be, so I'm left with quite some questions. A more advanced student of Mathematics has been able to answer most of them for me, but I'm still stuck with one problem, which is the statement that(adsbygoogle = window.adsbygoogle || []).push({});

[tex](x, (y, z)) = ((x, y), z) = (x, y, z).[/tex]

The parentheses denote ordered pairs (or a triplet, in the last case). Would anyone show me why this is true? Or is this too advanced to understand after ten pages of set theory?

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# Why is (x,(y,z)) equal to ((x,y),z)?

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