Does Russian have the concept of "sentence fragments" (as English does)?

Question

Question: Does Russian have the concept of "sentence fragments" (as English does), and is it also clearly considered a grammatical mistake? For an optional bonus part of this question, not required though, could you provide a link to a webpage discussing sentence fragments in Russian?Further explanation:In English grammar, you may have heard about a "sentence fragment". "Sentence fragments are groups of words that look like sentences, but aren't. To be a sentence, groups of words need to have at least one independent clause. An independent clause is any group of words that contain both a subject and a verb and can stand on its own."Example:Some girls in the class.The fragment can be changed to a correct sentence, as follows: Some girls in the class study together.Finally, the reason I am asking: When learning Russian, as a beginner, I sometimes encounter what appear to be sentence fragments. Although it could simply be that I am not sufficiently accustomed to the fact that "to be" or "is" are omitted.

Answer 1

I guess, if you are a beginner, the sentences in Present Tense could look like a "sentence fragment" for you with omitted "be" (there is no "is/am/are). There are sentences which could be called a sentence fragments", called "mono-nuclear" (односоставное), used mostly in literature (poetry) or colloquial speech to show stronger emotions. For example, in A. Pushkin's poem "Winter Morning": "Мороз и солнце; день чудесный!"

Impersonal sentences also could look like fragments: В лесу тихо (it is quiet in the forest).

I found one link to the discussion of this kind of sentences, but it looks like this question was already discussed there: https://russian.stackexchange.com/questions/16306/does-russian-have-the-concept-of-sentence-fragments-as-english-does