Why does $\frac{\sin x}{x}$ have no anti-derivative
Why can't the indefinite integral $\int\frac{\sin(x)}{x}\mathrm dx$ be found?
Standard packages for compact SMT crystals There is an old and bog standard form factor for SMT crystals - HC49/US. The problem is that HC49/US takes a lot of real estate on the board.  It's 12mm long.  Another problem with crystals and oscillators in general is that they often become long lead time items.  [This is my experience.]  There are lots of small form factor crystals from various manufacturers.  But, at a glance, it seems that there is no standardization of form factor.  It’s nice when packages are standardized.  It alleviates the long lead time problem.  Crystals from manufacturer B may be used, if crystals from manufacturer A are out of stock.  Are there standard form factors for compact SMT crystals?  Update  Armed with the insights from Gribo and Gustavo, I did a more focused survey.  Found that 12MHz in 3.2x2.5mm package are produced by: Abracon, Citizen, Epson, Fox, ECS, TCS, NDK.  To be included in this list, the part had to be in stock at DigiKey.  It turns out that 3.2x2.5mm package is common across many manufacturers. The official deck construction rules for Commander (nee EDH) at  say that 'A card's colour identity is its colour plus the colour of any mana symbols in the card's rules text.'  How does this apply to dual-faced cards with faces of different colors, such as  out of Innistrad or  from Dark Ascension, where the color of the transformed face of the card is different from the color of the 'main face'?  The spirit of the rules would seem to suggest that these cards are the colors of both faces for deck construction purposes, but not only are these spells always cast as the front face, the front face is the only one 'seen' in other game zones: for instance, when the card's in the library, you could find Elbrus by searching your library for an artifact, but you couldn't find Withengar Unbound by searching your library for a creature card.  Could Elbrus then, for instance, be played in any Commander deck, or just one with a (partly) Black general? Running two MySQL servers that use the same data directory Using Zorn's lemma show that $\mathbb R^+$ is the disjoint union of two sets closed under addition. Let $\Bbb R^+$ be the set of positive real numbers. Use Zorn's Lemma to show that $\Bbb R^+$ is the union of two disjoint, non-empty subsets, each closed under addition. What is the difference between correlation and causation? What is the difference between correlation and causation?  Pirates and Global Temperature Example  For example, how do we know when we're dealing with correlation only and not also causation here?   What Certain Philosophers Seem to Hold Regarding This  It would seem that   Hume would saycorrelation ≡ causation. Aristotle would say that in generalcorrelation ≢ causationand thatcausation ⇔ correlationonly if we are not dealing with chance events.   ("≡" means "is identical to," and "⇔" means "implies each other.") How can I undo "always allow" in keychain item Find the number of solutions to $ \lfloor x \rfloor + \lfloor 2x \rfloor + \lfloor 4x \rfloor + \ldots + \lfloor 32x \rfloor =12345$ Find the number of solutions of the equation    $$\lfloor x \rfloor + \lfloor 2x \rfloor + \lfloor 4x \rfloor + \lfloor 8x \rfloor + \lfloor 16x \rfloor + \lfloor 32x \rfloor =12345,$$   where $\lfloor\,\cdot\,\rfloor$ represents the floor function.   My work: I use the fact that $$\lfloor nx \rfloor =\sum_{k=0}^{n-1} \left\lfloor x +\frac kn \right\rfloor.$$ So the equation becomes $$\lfloor x \rfloor +\sum_{k=0}^{1} \left\lfloor x +\frac k2 \right\rfloor +\sum_{k=0}^{3} \left\lfloor x +\frac k4 \right\rfloor +\sum_{k=0}^{7} \left\lfloor x +\frac k8 \right\rfloor   \\ \qquad {}+\sum_{k=0}^{15} \left\lfloor x +\frac k{16} \right\rfloor +\sum_{k=0}^{31} \left\lfloor x+\frac k{32} \right\rfloor   \\ = \lfloor x \rfloor + \left\lfloor x+\frac 12 \right\rfloor + \left\lfloor x+\frac 64 \right\rfloor + \left\lfloor x+\frac{28}{8} \right\rfloor   \\ \qquad {}+ \left\lfloor x+\frac{120}{16} \right\rfloor + \left\lfloor x+\frac{496}{32} \right\rfloor$$  What should I do next? Set spawn point for a specific player I made a server and me and one of my friends want to do a prank on another friend, because he stole all my enchanted diamond armor.  The Prank  I want to set a player's spawn point in a pit of lava, how would I do this without affecting anyone else's spawn point? How can I add a newline in the text of a label in WPF such as the following?  &lt;Label&gt;Lorem    ipsum&lt;/Label&gt; How much web can Spider-Man produce? Well, I already searched meta as well as cleared my browser cache.  I realize this may be a SO cache problem, but it still seems kind of strange to me.    The deleted question is (assuming it still exists).  Shouldn't deleted questions only be visible to 10k users?  I'm only at 2k. I need to customize my references in the following style using biblatexs Alpha style having the columns Label, Author, and Title and Other Information.    Till now with your help I could already change the square brackets to slashes.   My code so far is:   \documentclass[12pt]{scrartcl}  .  .   \usepackage[% natbib        = true, backend       = bibtex8, %bibtex, biber style         = alphabetic, %citestyle     = alphabetic, maxcitenames  = 2, mincitenames  = 1, %bibstyle      = alphabetic, %authoryear, %draft, %, sorting       = nyvt, maxbibnames   = 6, minbibnames   = 6, language      = ngerman, date          = long, backref       = false, backrefstyle  = none,  % none, three, two, two+, three+, all+ firstinits=true  ]{biblatex}    \usepackage[babel,german=quotes]{csquotes}    \bibliography{input/literatur}      \newrobustcmd{\mkbibslashes}[1]{/#1/}      \DeclareFieldFormat{labelalphawidth}{\mkbibslashes{#1}}    \DeclareFieldFormat{shorthandwidth}{\mkbibslashes{#1}}     \DeclareCiteCommand{\cite}[\mkbibslashes]    {\usebibmacro{prenote}}    {\usebibmacro{citeindex}% \usebibmacro{cite}}    {\multicitedelim}    {\usebibmacro{postnote}}    \renewcaptionname{ngerman}{\refname}{Literaturverzeichnis}   .   .   .   Thanks again Something very odd is happening here.   I have a query that looks like this.  SELECT CAST(FT.DOP AS SMALLINT) FROM TRACKING_DATA WHERE date &gt; @mydate and identifier = 0000000000   When run as a raw query it returns data just fine.  When i place it in a stored procedure that alters the where clause it throws this error.  Msg 244, Level 16, State 2, Procedure myprocedure, Line 107 [Batch Start Line 2] The conversion of the varchar value '58629' overflowed an INT2 column. Use a larger integer column.   So here is the oddity. I go through all the possible data for that where clause with a query like this.  SELECT DISTINCT DOP FROM TRACKING_DATA where identifier = 000000000000   and  SELECT DISTINCT CAST(DOP AS smallint) FROM TRACKING_DATA where identifier = 000000000000   And this is what i get back.  17 12 9 19 8 14 6 16 11 13 7 10 0 18 5 15 4   Nowhere does it have anything remotely too large for a SMALLINT. So i thought, ok maybe its a non-printable ASCII character. But i can't find any.  I'm a little perplexed at the moment. It runs find as a raw query, explodes as a procedure and all possible data based on the where is valid. My only suspicion is that the query plan is doing something odd with filtering or maybe runs with different validation when run as a procedure. Explicit construction of a finite field with $p^n$ elements Proving $1-\exp(-4x^2/ \pi) \ge \text{erf}(x)^2$ How to remove duplicate entries in dash? Where and how does the Bleach anime diverge from the manga? I've seen almost all of the Bleach anime (at least what's been released dubbed), and I'm now interested in reading the manga. However, when the manga closely follows the anime I've already seen, I tend to get bored quickly. Thus, I'd want to pick up the manga at a point right before the anime began to diverge.  At what point in the manga is this? Range of A and null space of the transpose of A So I'm complete stuck with something. I know it the following statements are true (or at least the seem to be from the results that I got from messing around with it a bit on MATLAB), but I don't understand why they are true or how to show so. Let $A$ be and $m$X$n$ matrix. Show that:  a) if $x \in N(A^TA)$ then $Ax$ is in both $R(A)$ and $N(A^T)$.   For this one I messed around with it with my own examples and I got $Ax=0$, therefore satisfing the statement, but I don't understand what's actually going on.   b) $N(A^TA)=N(A)$  again, makes sense when I see the results in MATLAB, but don't undestand why it works.  c) $A$ and $A^TA$ have the same rank  d) If $A$ has linearly independent columns, the $A^TA$ is nonsingular.  For the last two I have no idea on how to even start showing the relationship. I feel like I'm missing some crucial relationship between $A$ and $A^TA$, but I'm just not seeing it.   I would greatly appreciate any help of sugestions on how to show that these statements are true.   Thank you very much. I am using ArcGIS 10.1 and I have a non-spatial table and some layers in a Data Frame.   When I switch to Layout View I want to be able to show the map in a data frame element and the table in another element (something that one could do with "Add Table To Layout" from Table Options, but I want to do this in one step without having to go to Table Options).   Is there a way to do this using ArcPy?   I couldn't find any function in the ArcPy library that would create a new Layout Element ... and then I also don't know how to add the contents of the table to the Layout Element. How to remove zsh alias? I have an alias which is predefined by an oh-my-zsh plugin.  -&gt; % alias gcm gcm='git checkout master'  I'd like to remove it, i.e. I'd like alias | pcregrep "\bgcm\b" return 1. I've tried with alias gcm='' but after that the alias is still existent.