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26
votes
6answers
1k views

Why use Konjunktiv I in mathematics?

Konjunktiv I is mostly used for indirect speech and wishes. The following sentence is neither: Die Funktionen ψn(x) seien Eigenfunktionen eines Hamiltonoperators Ĥ. Why is the Konjunktiv I used ...
8
votes
1answer
368 views

How to read in German these mathematical symbols (f′,f″,f‴,∘,ã ,â,…)?

How to read the mathematical notation of the small list below, say in a blackboard-talk. Notice that I'm not asking for the meaning, but the name of the symbol attached to "the letter" is what ...
15
votes
4answers
261 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 ...
9
votes
2answers
314 views

Zweistellige Zahlen und Stellenwertsystem

Im Deutschen werden ja bei den zweistelligen Zahlen die Einer vor den Zehnern ausgesprochen, während das für die höheren Stellen nicht mehr gilt, sodass es zu der unsystematischen Reihung ...