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- #1

- Jan 17, 2013

- 1,667

- Thread starter ZaidAlyafey
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- #1

- Jan 17, 2013

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- Mar 22, 2013

- 573

Look at the leftmost edge of the page and you'll see a tool to send message to the editorial board. Quote the line you feel is incorrect, then send them that.

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- #4

- Jan 17, 2013

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Oops , sorry for that , I edited it.Hi Zaid,

Both of your links refer to the same page.

- Aug 30, 2012

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- Mar 5, 2012

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What's wrong with that?

Actually W|A gives $\log(x) + \color{gray}{\text{constant}}$.

And isn't that true for all $x>0$? It's not as if W|A gives a domain.

Isn't it also true for all $x \in \mathbb C^*$?

Anyway, even in the real numbers it is properly:

\begin{cases}\ln x + C_1 & \text{if } x>0 \\ \ln(-x) + C_2 & \text{if } x<0 \end{cases}

I think that W|A prefers complex numbers, or otherwise would probably still not give such a convoluted answer.

- Jan 31, 2012

- 253

- Aug 30, 2012

- 1,162

Good point. Not to hijack the thread but can you quickly tell me how you would tell Wolfram x is real?

-Dan

- Jan 31, 2012

- 253

But the following command seems to return nonsense.

assuming[Element[x, Reals] , int [1/x,x]]

Look at the leftmost edge of the page and you'll see a tool to send message to the editorial board. Quote the line you feel is incorrect, then send them that.

Yeah, right. An awful lot of mistakes. I once tried that send message and sent the error and correction but no one looked at it, and remains incorrect today as well, and so I think its useless. In fact, I think Wikipedia is less error-prone than Mathworld.

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- #11

- Mar 5, 2012

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Which mistake?Yeah, right. An awful lot of mistakes. I once tried that send message and sent the error and correction but no one looked at it, and remains incorrect today as well, and so I think its useless. In fact, I think Wikipedia is less error-prone than Mathworld.

One that I found recently: Semiperimeter -- from Wolfram MathWorldWhich mistake?

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- #13

- Mar 5, 2012

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So where is the mistake in that article?One that I found recently: Semiperimeter -- from Wolfram MathWorld

"and Brahmagupta's formula for the area of a quadrilateral:"So where is the mistake in that article?

Is the formula after that Brahmagupta's!

- Nov 4, 2013

- 428

Erm...it is."and Brahmagupta's formula for the area of a quadrilateral:"

Is that formula after that Brahmagupta's!

Brahmagupta's formula - Wikipedia, the free encyclopedia

- Nov 4, 2013

- 428

Yep, sorry, the wikipedia article I linked to also states that it is Bretschneider's formula.

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- #18

- Mar 5, 2012

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The problem is that the credits given are not correct in that article.

Just now, I have sent a contribution to MathWorld with the suggestion to correct this.

We'll see.

- Mar 22, 2013

- 573

At least, more than wikipedia in any case.IlikeSerena said:Hmm, so the math is perfectly correct and as such MathWorld is reliable.

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- #20

- Mar 5, 2012

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I'll bite.At least, more than wikipedia in any case.

Where is the mistake in wikipedia?

- Mar 22, 2013

- 573

Somehow, I knew you'd say that. There have been many changes in wiki since I saw them, so I will show you only the ones I can find.Where is the mistake in wikipedia?

First, I remember wiki giving a terribly false estimate for the totient sum

$$\sum_{n\leq x} \frac1{\varphi(n)}$$

Which I don't remember what it was and they corrected it afterwards, as I see it.

Second is something on tetration, I haven't seen whether it is still there but I can't rember it either.

The last is Von Mangoldt. It's fresh as new and you can see all the craps there if you open the page up.

No, the formula named is wrong, which is problematic.isreliable.

The problem is that the credits given are not correct in that article.

Just now, I have sent a contribution to MathWorld with the suggestion to correct this.

We'll see.

And I had already sent a message to them, but there has been no corrections!

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But you can correct errors in Wiki with no prob. The MathWorld team however never listens to any suggestion and the mistake remain mistakes.At least, more than wikipedia in any case.

But form my experience Wiki is not at all as bad as people say.