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18
votes
4answers
545 views

Why use Konjunktiv I in mathematics?

Konjunktiv I is mostly used for indirect speech and wishes. The following sentence is neither. Die Funktionen ψ_n(x) seien Eigenfunktionen eines Hamiltonoperators Ĥ. Why is the Konjunktiv I used ...
10
votes
3answers
162 views

Konjunktiv in mathematics without subject at the beginning

A follow-up question to the use of "sei" in mathematics. Compare the two following sentences, which are both common: Es sei f eine stetige Funktion. Sei f eine stetige Funktion. Would ...
5
votes
1answer
136 views

When speaking about oneself, should Konjunktiv I or Indikativ be used?

I was reading about the use of Konjunktiv I, and read that it is really only used by reporters. However, this got me thinking, if I were a reporter, and I were talking about something I said, would ...
4
votes
1answer
257 views

Konjunktiv 2 Plural von kennen

Neulich las ich in der "Zeit" einen Satz, der mich im Lesefluß stocken ließ. Ich kann mich nicht genau an den Satz erinnern, daher hier eine "in etwa-e" Wiedergabe: Die Behauptung vieler ...
3
votes
2answers
126 views

Subjunctive II in “fast” case

The (past) subjunctive II is usually used to express imagined results in the past that are the opposite to the reality. Wenn mich jemand gewarnt hätte, hätte ich den Fehler nicht gemacht. "If ...
3
votes
3answers
533 views

Can it be correct to use “sei” instead of “ist” in this sentence?

Could someone please tell me if this sentence is correct? "Es sagt, daß das verboten sei."
0
votes
4answers
402 views

Indirect speech in this context

If I want to say, I told you I was proud of you, what do I say? Ich sagte dir, dass ich auf dich stolz sei. Ich sagte dir, dass ich auf dich stolz wäre.