19 votes

How do you read fractions in Russian?

Numerical fractions 2/3 = две третьих or две трети The numerator of a fraction is always a cardinal number and the denominator is an ordinal number in Genitive (singular if the numerator ends in "...
user avatar
  • 5,130
8 votes
Accepted

How to pronounce long decimal numbers?

I don't think there's any set rule, but as a native speaker I can advise the following options. First you have to know that in Russian the decimal separator is comma , (pronounced запятая, ...
user avatar
  • 2,252
7 votes
Accepted

Usage of verb взять

Here's my attempt of an answer (I might have to post it unfinished and come back to it later). I assume that your native language is English. Take as well as Russian взять / брать are the examples of ...
user avatar
  • 2,992
6 votes
Accepted

"Орел и решка" or "решка и орёл"?

Intuitively, I do feel that there's a preference for putting орёл first, and a quick exact phrase search on Google confirms it: орёл или решка is about three times more frequent than решка или орёл, ...
user avatar
6 votes

Pronunciation of J

The two names, йот and жи, are equally correct, this table lists them both under "классическое русское название буквы". I don't go in for mathematics a lot so as to comment on their disrtibution, but ...
user avatar
  • 25.8k
6 votes
Accepted

How do you read fractions in Russian?

A fraction x/y is pronounced by mathematicians as икс на игрек. Moreover, a product xy is pronounced the same way if you want to include a word representing the operation (often you do not and would ...
user avatar
  • 4,902
6 votes
Accepted

Do there really exist plural forms for "математика" and "физика"?

The very fact that some noun has valid plural form doesn't mean that that plural is in active use. In practice it can be used quite rarely. Consider, for instance, "сметана" - we can ...
user avatar
  • 37.5k
5 votes

Could a translation error lead to squares to not be considered as rectangles?

I believe i would answer exactly as the answer key shows, which in your opinion is incorrect. I guess the translator/s thought that when English speakers say 'rectangle', it means 'oblong in ...
user avatar
4 votes

Pronunciation of J

I learnt physics, and I don't remember that on lectures anyone called J йот. As far as I know, in physics, as well as in mathematical analysis lectures, J is жи, unless something changed in recent 20 ...
user avatar
  • 8,407
4 votes
Accepted

"cutoff" in an integral

@DmitryAlexandrov: did those links to English examples help you? Yes, they helped of course. I’ve googled around the Web and made sure that @vix2 is absolutely right: cutoff as a verb would be ...
user avatar
4 votes

"cutoff" in an integral

"Интеграл обрезается на высоких частотах в связи с конечными " "Интеграл обрезается на дебаевской моде" etc.
user avatar
  • 41
4 votes

умножить на vs. на

Imagine the teacher stands in front of the class. Addressing the audience the teacher will never say Сколько будет восемь на семь? but always Сколько будет восемь умножить на семь? If a teacher ...
user avatar
  • 2,399
4 votes

умножить на vs. на

I think most people will realize this form if listener knows that you talking about math. Also, a little bit more precise, you can say "восемью семь" or "трижды семь" for 3 * 7.
user avatar
4 votes
Accepted

"Имя числительное" или "номер"?

Итак, есть четыре основных связанных с понятием number термина: Цифра - знак для числа, подобно тому, как буква - знак для звука (1, 2, 0); Число - собственно, математическое понятие; Номер - число, ...
user avatar
4 votes

Join infinite distributive (mathematical)

I'm not familiar with the term but comparing the definitions you linked and Блюмин С.Л 2.4 (17) and (18), looks like the translations are: infinite distributive - бесконечно дистрибутивная join-...
user avatar
3 votes

Usage of the preposition "от"

First thing - "от" is not a verb, but preposition. As for usage with derevatives - mathimatical text in Russian is very hard to read due to lots of grammatics dependences between close and distant ...
user avatar
  • 778
3 votes
Accepted

Usage of the preposition "от"

In a mathematical context, there is no practical difference. Where "от" is explicitly used, it just (in my view) reinforces the genetive case. In some phrases it is customary; in some not ("сумма от ...
user avatar
  • 2,672
3 votes
Accepted

Pronunciation of J

Others have commented on the correctness of the name. I'll get to why you can hear both (and probably more) versions. In the Soviet Union (and in modern Russia still), the average knowledge of foreign ...
user avatar
  • 4,684
3 votes
Accepted

меняться и изменяться

In the meaning of "vary, become different" the verbs are synonymous, with both used in academic style with no difference in connotation — i.e. the choice of a verb in a particular sentence is up to ...
user avatar
  • 5,130
3 votes

n-th: как написать/произнести?

The grammatically correct form is only n-й. Acoording to entrenched tradition accretion suffix must be one-letter if the last letter of numeral follows by vowel: 5-й день (пятый день), 25-я годовщина (...
user avatar
  • 31
2 votes

How do you read fractions in Russian?

I would say "икс делённое на игрек" or "икс делить на игрек". If from the context it is clear that multiplication excluded, you can say just "икс на игрек" but this also can mean multiplication.
user avatar
  • 14.2k
2 votes

Handwritten sigma in mathematics

Mathematicians (at least in Russia) do not specially learn and/or practice Greek calligraphy, except while handwriting math formulas. So the quality of average handwriting may be somewhere between bad ...
user avatar
  • 15.2k
2 votes

умножить на vs. на

Умножить на is formal and "official" name of operation, на is colloquial abbreviation. Also, на could be abbreviation of division (разделить на or делить на), that's why it can be unclear, when you ...
user avatar
  • 1,940
1 vote

Do there really exist plural forms for "математика" and "физика"?

The plural forms really do exist and there is a reason for it. The usage of the words is not very common but if you compare completely different approaches to a similar problem, Newtonian mechanics to ...
user avatar
1 vote

Is there an established mathematical term for "vector rejection"?

If you need a term, you can say ортогональная составляющая вектора v относительно оси k (as opposed to ортогональная проекция вектора v на ось k). Bear in mind, though, that this is not a term from ...
user avatar
  • 868
1 vote

Usage of the preposition "от"

No extra details. Some people use 'от' when they talk about algebraic or trigonometric functions (but not arithmetic though). So 'Производная от функции', 'Интеграл от функции' are acceptable as ...
user avatar
  • 494
1 vote

Usage of verb взять

In a casual or semi-casual conversation about math взять can work as a synonym for вычислить. I can easily imagine a math lecture containing phases like Теперь давайте возьмем от этого выражения ...
user avatar
1 vote
Accepted

Handwritten sigma in mathematics

In my personal experience (I studied in Moscow in applied maths) I've seen people writing both versions of sigma, but "Russian" one really was more common. And also there is a rather common scenario, ...
user avatar
  • 2,147
1 vote

Handwritten sigma in mathematics

You are probably seeing some local quirk of the speakers. I searched online for Russian math videos where I thought it most likely I'd see a lowercase sigma: in analytic number theory for the real ...
user avatar
  • 4,902
1 vote

умножить на vs. на

AFAIR the teachers in school insisted on saying "умножить на" but everyone just says "на" as it's more convenient.
user avatar
  • 15.2k

Only top scored, non community-wiki answers of a minimum length are eligible