User:Prime.mover




 * ... some Useful $\LaTeX$ constructs


 * ... and some proof structures


 * ... and some stubs for journal citations


 * ... and some $\LaTeX$ commands, alphabetical


 * ... Alec Cooper's old date template


 * ... and a cloud-based flowchart drawing package


 * $\begin{pmatrix} \tilde\odot & & \tilde\odot \\ & \stackrel{\bot}{\smile} & \end{pmatrix}$


 * $B_4 i \sqrt u \dfrac {r u} {16}$

Listen here, wolfchild ...

 * Information is not knowledge.
 * Knowledge is not wisdom.
 * Wisdom is not truth.
 * Truth is not beauty.
 * Beauty is not love.
 * Love is not mathematics.
 * Mathematics is the best...


 * For my funeral, I want an open casket affair.
 * I want to be dressed as Dracula, complete with costume fangs and theatrically-placed blood drips.
 * I want the ceremony to take place in the creepiest dankest spider-infested crypt that can be found.
 * I want the Catholic Mass to be performed backwards by a defrocked priest.
 * And finally, I want a stake hammered through my heart at the climax of the ceremony.


 * There once was a Yank in the UK
 * He'd been there since back in Y2K
 * While the girls made him smile
 * The food was quite vile
 * And the beer was utterly pUK


 * There was a young lady named Valerie
 * Who oft consumed many a calorie
 * Her clothing was roomy
 * Her health reports gloomy
 * And her food bill exceeded her salary

A Roger Waters parody

 * Isn't work horrid? Aren't I glad
 * That I don't have to do it.
 * Isn't time horrid? There's never enough
 * I must confess I blew it.
 * Isn't money horrid? But I don't care
 * I'm rolling in the stuff
 * Isn't war horrid? People say
 * I've said this often enough
 * Are you mental? So am I
 * And so's my old band friend
 * Every silly stupid thing
 * Will all come to an end.

What's THIS For ...!
Sandbox, In Progress, Later, Help Needed.

Keep chipping away ...

Jokes

 

Potw

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That which does not kill us makes us soggy and hard to light.

Please sign your posts.

THE MOST COMMON ERRORS IN UNDERGRADUATE MATHEMATICS

In particular I need to look at:

"Some more advanced students (e.g., college seniors) use the implication symbol ($\implies$) as a symbol for the phrase "the next step is." A string of statements of the form


 * $A \implies B \implies C \implies D$

should mean that A by itself implies B, and B by itself implies C, and C by itself implies D; that is the coventional interpretation given by mathematicians. But some students use such a string to mean merely that if we start from A, then the next step in our reasoning is B (using not only A but other information as well) and then the next step is C (perhaps using both A and B), etc.

Actually, there is a symbol for "the next step is." It looks like this: $\leadsto$ It is also called "leads to," and in the LaTeX formatting language it is given by the code \leadsto. However, I haven't seen it used very often."
 * Such a distinction seems unnecessary, especially considering theorems such as Extended Rule of Implication. Surely at each step of the way we have an implied $\land$ going on everything before it? --GFauxPas 04:23, 12 February 2012 (EST)
 * Just a comment...I've seen $\leadsto$ to also mean "converges to" for sequences. Andrew Salmon 17:56, 12 February 2012 (EST)
 * Every notation has been used for more than one thing. The point is we need to choose one and stick to it. --prime mover 18:22, 12 February 2012 (EST)
 * What about $\therefore$, i.e. 'therefore' (given by \therefore)? It is relatively unambiguous, but little known/used. I have come to prefer words when other people have to read my work as well; in all other cases, $\implies$ suffices instead. --Lord_Farin 19:03, 12 February 2012 (EST)
 * I've seen cogent arguments elsewhere as to why not to use $\therefore$ but, shrug, do I care nowadays ...--prime mover 01:08, 13 February 2012 (EST)

the generalization of the tarski-vaught test is also a standard statement of the theorem, and while slightly more general, it does not really require much more of a proof, hence the modication.--Yaddie 17:33, 6 March 2012 (EST)


 * ... but as I say, please make the statement as a separate section of this page. As soon as I've finished what I'm currently doing I'll get onto it. --prime mover 17:36, 6 March 2012 (EST)


 * [[File:Tireless Contributor Barnstar.gif]]