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?)

2 Answers 2


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.

  • 6
    When reading a formula one might also omit the „mit“ and say only „A vereinigt B“.
    – Carsten S
    Commented Jan 21, 2014 at 21:32
  • 2
    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.
    – user2183
    Commented Oct 20, 2015 at 22:25

Union ist Vereinigung. Wikipedia ist oft hilfreich, wenn es um Fachbegriffe geht, die ein normales Wörterbuch nicht aufführt. In diesem Fall https://de.wikipedia.org/wiki/Menge_%28Mathematik%29

  • 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
    Commented Jan 21, 2014 at 19:48
  • Die Vereinigung von A und B.
    – Robert
    Commented Jan 21, 2014 at 19:55
  • @Robert: Du solltest die Antwort selbst korrigieren, nicht die Antwort im Kommentar nachschieben. Commented Jan 22, 2014 at 2:38

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