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How is the set "A union B" read in German? Is it "Die Vereinigung von A und B" or "A vereinigt mit B"?

(Also, is there some place that describes how mathematical expressions are read in German?)

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up vote 11 down vote accepted

Both is correct.
The "Vereinigungsmenge" is read as:

  • A vereinigt mit B or
  • Die Vereinigung(or Vereinigungsmenge) von A und B

Consequently, the "Schnittmenge" is read as:

  • A geschnitten mit B or
  • Die Schnittmenge von A und B

Wikipedia is indeed a great place to start, but I also suggest – in case you're interested in maths – to watch lectures on Youtube. I can really recommend, for example, the videos of Christian Spannagel.

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When reading a formula one might also omit the „mit“ and say only „A vereinigt B“. – Carsten S Jan 21 '14 at 21:32
It's not just that one 'might' do it, it's what everyone normally does.Similarly "A geschnitten B". The other options are too long for daily use. – Hans Adler Oct 20 '15 at 22:25

Union ist Vereinigung. Wikipedia ist oft hilfreich, wenn es um Fachbegriffe geht, die ein normales Wörterbuch nicht aufführt. In diesem Fall

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Thanks, Robert. I'm interested in how "A union B" is read out loud in German. I don't think you've answered that question. – JJ Beck Jan 21 '14 at 19:48
Die Vereinigung von A und B. – Robert Jan 21 '14 at 19:55
@Robert: Du solltest die Antwort selbst korrigieren, nicht die Antwort im Kommentar nachschieben. – user unknown Jan 22 '14 at 2:38

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