use of "lest" grammar
Correct usage of "lest"
Is $C[0,1]$ a Banach space for the $L^1$ norm? Is $C[0,1]$ a Banach space with respect to the norm $\|f\| = \int\limits_0^1|f(t)| \, dt$?   People keep telling me it is, but lets consider: $f_n(x) = x^n$. This function defines a Cauchy sequence, yet the limit clearly isn't a continuous function! Installing PHP 5.3 in Ubuntu 14.04 MicroSD card is set to Read-only state. How can I write data on it? I have a MicroSD card reader in my notebook. When I insert a MicroSD memory card into it, I can't write any data on it - it's read-only. The same thing happens when I try to do it under root. And I can't change the permission policy for it. This problem happens for all microSD cards (I've tested 2 cards). I've encountered it on Ubuntu 12.04 LTS, now I'm on Ubuntu 12.10, the problem is still on it's place. When I try to insert such a "read-only" card in my mobile phone, everything's OK and I can write data on it. So, can anybody tell me, how can I write a data onto the card?  UPD: here's fdisk -l output:  Disk /dev/sdc1: 2013 MB, 2013135360 bytes 62 heads, 62 sectors/track, 1022 cylinders, total 3931905 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000   Device Boot      Start         End      Blocks   Id  System   The file system of the card is msdos. As to me it's weird.   UPD2: I've found a small "lock" switch on my card adapter, and it turns out, that when I insert it in my notebook, it switches on. Perhaps, I have to find some glue or something to get that switch stuck...  UPD3: There was no glue near me, so I've decided to buy another card-reader. independent variables in Random forest model Is "mens" a valid word? I've been living in Ireland for almost a year now and I start noticing they use the word "mens" a lot. I can see it used in:   Shops, to denote the area where you can find men's clothes In sport, when they talk about "mens team".    My guess is just that they are lazy about the use of quotes, so that mens should actually be men's. However, there may be some rule I'm not aware of. So, is "mens" only limited to Irish English? When I'm allowed to use it? printing a block of text that matches a pattern Using just shell script, how to search a text file and list all whole blocks of lines that has inside some text (simple grep criteria).   The text file has blocks of lines separated by "-----------------" (precisely, each block start with "\n\n\n--------------------"... about 50 chars "-").  A sample could be:  ------------------------------- Abracadabra, blablablalbalba blablablabla, banana    ------------------------------- Text, sample text, sample text, sample text Text, sample text, sample text, sample text Text, sample text, sample text, sample text Text, sample text, sample text, sample text   -------------------------------   Text, sample text, sample text, sample text banana. Sample text, sample text, sample text, sample text Text, sample text, sample text, sample text   Lets consider the word "banana" the search criteria. So, the blocks listed would be:  ------------------------------- Abracadabra, blablablalbalba blablablabla, banana   ------------------------------- Text, sample text, sample text, sample text banana. Sample text, sample text, sample text, sample text Text, sample text, sample text, sample text   EDIT:  Testing answers to try awk, like: awk 'BEGIN{RS="\n------------"}/INFO/{print}' where INFO is what was searched for. I cannot get the whole block. So, follows a real sample and the result:  A REAL SAMPLE (including the first 3 new lines):      ------------------------------------------------- Diretório separado do nome o arquivo: adis, IWZLM (/home/interx/adis/src/IWZLM.SRC) Gerando rotina em linguagem C: (yla5 adis IWZLM -if) .INFO =>Rotina BLOQUEADA (status 'M'): Geracao ignorada (use -is para ignorar checagem do status)  [  OK-I ] IWZLM (adis) - Lista lay: Geracao ignorada do codigo em C.    ------------------------------------------------- Diretório separado do nome d arquivo: adis, ADISA (/home/interx/adis/src/ADISA.SRC) Gerando rotina em linguagem C: (yla5 adis ADISA -if) .ERRO: Falha inesperada  Compilando o programa: (ycomp adis ADISA -exe adis/exe/ADISA.temp.exe ) adis/exe/ADISA.temp.exe => adis/exe/ADISA  [  OK   ] ADISA (adis) - Menu A : Gerada e compilada com sucesso.    ------------------------------------------------- Diretório separado do nome o arquivo: adis, ADISD1 (/home/interx/adis/src/ADISD1.SRC) Gerando rotina em linguagem C: (yla5 adis ADISD1 -if) .ATENCAO: Definicao nao localizada  Compilando o programa: (ycomp adis ADISD1 -exe adis/exe/ADISD1.temp.exe ) adis/exe/ADISD1.temp.exe => adis/exe/ADISD1  [  OK   ] ADISD1 (adis) - Menu : Gerada e compilada com sucesso.   I cannot get the whole block, just the line containing "INFO", like a ordinary grep, either setting or not ORS:  $ cat file  | awk 'BEGIN{RS="\n------------"}/INFO/{print}'  .INFO =&gt;Rotina BLOQUEADA (status 'M'): Geracao ignorada (use -is para ignorar checagem do status)   NOTES: It is the awk from AIX 7.1, not gawk. Find $\lim_{n \to \infty} \left[\frac{(n+1)^{n + 1}}{n^n} - \frac{n^{n}}{(n-1)^{n-1}} \right]$ (a question asked at trivia) I often use  to keep my sentences gender neutral. Many of my friends (none of them are native speakers), however, consider this to be grammatically incorrect, and suggest me not to use it in formal English exams.  My questions are:   Is singular they widely accepted in English speaking countries such as America and Britain? Is it formal enough to be used in formal situations, such as a public speech? Is it casual enough to be used in informal situations, such as gossiping among friends? SSH and home directory permissions Ignore Pulses Less than a Given Width in a Pulse Train Let's say I have a 5V pulse train that varies between 0 and 75000 pulses per second. Pulse width, let's say, is 5 microseconds. How could I calculate or determine the best way to filter out all pulses less than 4 microseconds in width? $n \mid (a^{n}-b^{n}) \ \Longrightarrow$ $n \mid \frac{a^{n}-b^{n}}{a-b}$ How does one prove that if $n \mid (a^{n}-b^{n}) \ \Longrightarrow$ $ \displaystyle n \mid \frac{a^{n}-b^{n}}{a-b}$ where $a,b, n \in \mathbb{N}$.  What i thought of is to consider $$(a-b)^{n} \equiv a^{n} + (-1)^{n}b^{n} \ (\text{mod} \ n)$$ and if we suppose that $n$ is odd then we have, $$(a-b)^{n} \equiv a^{n} -b^{n} \ (\text{mod} \ n)$$ and since $n \mid (a^{n} - b^{n})$ we have $$(a-b)^{n} \equiv 0 \ (\text{mod} \ n) $$  I think i am far away from the conclusion of the problem, but this is what i could work on regarding the problem. Good books on "advanced" probabilities When the site is in read-only mode, I get a message like this:     This site is currently in read-only mode.   Would it be possible to update that message to provide links to these resources on SE's status:   : Official SE tweets on SE's status. : Official blog posts on SE's status. Difference between "commit suicide" and "suicide" What is port forwarding and what is it used for? There are a lot of questions on , but there doesn't seem to be one that clearly states what it is and what it's used for. So:   What is port forwarding? What is it used for, and why would I need it? Why does Stack Exchange use Imgur over Amazon S3 or Azure? What benefit does  offer over , , etc. for image hosting?   Is it the simplicity of integration? The cost model? What's better about using a "gateway"? Why does ltablex skip a number in captions? The below example presents two tables with an tabularx environment (taken from package ltablex) and a caption. After each tabularx-table, the table counter skips one, as if both the caption and the tabularx environment increase it, while the latter shouldn't.  \documentclass{report} \usepackage{ltablex} \begin{document}  \begin{table} \caption{Caption 1.} % "Table 1" \begin{tabularx}{\linewidth}{|c|} empty table \end{tabularx} \end{table}  \begin{table} \caption{Caption 2.} % "Table 3" \begin{tabularx}{\linewidth}{|c|} empty table \end{tabularx} \end{table}  \end{document}   My reputation doesn't allow me to upload a picture, but the captions are Table 1 and Table 3 respectively. For quite some time now I have been asking myself how the world of Game of Thrones is shaped and if the people living in that world know the shape.   In questions here on SciFi.Stackexchange concerning the unnatural seasons or the definition of a year in Westeros, it is often  that the Westerosi can measure the duration of a revolution of their planet around the sun. But that only works if they know that they actually live on a planet.   In  answer it was said that people have been travelling in ships around the world. However, I cannot remember any passage in the books supporting this. Actually I only remember evidence for the opposite:    During the  on the Iron Islands, there is a man called  who promises the Ironborn treasures from lands far to the west, if they elect him as king. However, the POV character of that chapter (I think it was Victarion Greyjoy) does not believe him and sees the madness in Gylbert's eyes - as if speaking of travelling west is crazy.  Later when he leads the attack against the Shield Islands, the Iron Fleet travels out of sight of the coast line. This manoeuvre is considered very dangerous and risky. If this is already dangerous, traveling even further west appears close to suicide.   In addition, there was a  who sailed to the far west and never returned.   establishes that the world is not a hollow world, but is not conclusive as to whether it is a planet.  Is there any evidence in the books that the World of Ice and Fire is a planet? Was it established that the Westerosi know the nature of their world? Bring a window to the front in WPF When we say something in specified operating system, which preposition should I use?  e.g.     I play games {in/on/under} Windows.