Term "infinity" doesn't have one precise mathematical meaning. Shouldn't some stars behave as black holes? reasons that I disagree with the CW-ification of this (and other) questions. :-), With that said, I am personally not entirely convinced that that is a good reason to make the question CW. Examples of back of envelope calculations leading to good intuition? After all, any number subtracted by itself is equal to zero, however infinity is not a real (rational) number. There is no reason that such a question should be community wiki --- it is a legitimate question, which has more or less a definitive answer, namely that such an expression is indeterminate without more information/precision as to what is meant. “The infinity of space” synonyms: endlessness, infinitude, infiniteness, boundlessness, limitlessness, unlimitedness, extensiveness, vastness, immensity; infinite distance “She stared out into the infinity of space” MATHEMATICS A number greater than any assignable quantity or countable number (symbol ∞). The above question, however, is not a soft question or big list, neither in tag nor apparently in essence (my understanding of what a soft question is, this isn't one to me, but I'm happy to admit I may not fully grasp your definition of a soft question). How to make my own professional book step-by-step( there is a course or a book that I didn't find?). Did the original Star Trek series ever tackle slavery as a theme in one of its episodes? In short, I think that the question is phrased in as reasonable a way as possible given that the OP clearly doesn't know (or perhaps even suspect), @Matt That is consistent with what I wrote. However, as they say in chess, even a master makes a blunder now and then. Relevance. 4 years ago. A recalculation will be necessary to refund the reputation. rev 2020.11.24.38066, Mathematics Meta Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Can a moderator just decide to transfer the ownership of my question to the community? I'm technically for the reversal of the community wiki (on the grounds that there hasn't been strong support for the current status, and lots more support opposing that status), and recommend it as the course of action. @Rasmus: Dear Rasmus, As an indication of why this question is well-posed, let me offer the following example: if a student were to ask "why must a signed measure assume only finite values (or at least not both infinite and negative infinite values)", the answer would be "because we can't make sense of $\infty - \infty$". I cannot find any evidence for this claim. The question is even amongst your top-voted questions, which is a nice place to see that it is otherwise populated primarily by normal questions. I told him to open up a new meta thread, but he decided not to follow through... oh well. Infinity minus infinity really is irrelavent and unknowable. [math]\frac{\partial y}{\partial x}[/math], Students ask for homework help on online homework forums and get help from experts and student-volunteers, Students post questions and get answers from Industry experts, Students earn rewards for asking and answering questions, Students earn volunteer hours for helping other students from the comfort of their home, Students are incentivized to post questions and answer questions posted by experts, Teachers have access to a library of questions with contributions from teachers and industry experts, Students enjoy personalized learning with a recommendation engine that adapts to student progress and personalized help from experts, Possess track record in academic and professional excellence. In these circumstances, community wiki can be a way to preserve the value of these posts while stifling their growth. 3. Now the question under discussion is essentially of the same nature (except without the initial movitation coming from measure theory), ... @Rasums: Dear Rasmus, The body of the question says "Is it $\infty$ or $0$ or what"? About the [soft-question] and [big-list] tags. But that policy does not fit here because this site is - by charter - a general level math site. I am not quite sure how to find out an answer to that question myself.). As for the size of Community Wiki, let me crunch some numbers for you. Teachers love Qalaxia as it not only helps their students finish homework and satisfy their curiosity but also gives teachers full transparency into how much student effort and expert help went into every homework question. @Bill Ah, the square brackets in the parentheses broke it. 2.- When it is possible simplify the expression: Another option is to do the subtraction and to obtain only one expression where probably we will have an indeterminate form of the type infinity divided by infinity, which we can already solve.Let's see an example: @Grace CW is used on MO as one way to discourage posts that are at the boundary of being too low-level. Please advise. Yes, if we reverse the community wiki status, it will be as if there never was community wiki on the posts. I think this is a pretty clear indication that the questioner doesn't know the answer, recognizes that they don't know the answer, and would like advice on what the answer is. Should removing “Community Wiki” from a question also remove “Community Wiki” from all the answers? While reasoning for about 10 minutes, here's the useful things I came up with on the subject that could be used to reason the answer with. Infinity plus one is still infinity. @Matt Could I convince you to post that viewpoint, and its reasoning, as an answer rather than having it tucked and hidden here in comments? Share your knowledge or write an opinion piece. 1: There are different size infinities, some being infinitely bigger than others. Infinity Minus Infinity Return to the Limits and l'Hôpital's Rule starting page.