Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#2 Re: Maths Is Fun - Suggestions and Comments » Minor Upgrade - may or may not go smoothly » 2019-04-26 14:09:14

Upgrade completed. Am getting a few internal error messages like "Invalid argument supplied for foreach()" that I can hopefully squash.

But just clicking around the forum it seems fine. If you find any glitches let me know, OK?

#3 Re: Maths Is Fun - Suggestions and Comments » Minor Upgrade - may or may not go smoothly » 2019-04-26 09:44:42

I may be able to do this minor upgrade in the next few hours.

It is a "no going back" type of server upgrade, and is necessary because the old version we are running is no longher supported. I have been waiting for a time when I have a few hours available to fix any issues.

#4 Maths Is Fun - Suggestions and Comments » Minor Upgrade - may or may not go smoothly » 2019-04-15 16:26:32

MathsIsFun
Replies: 17

When things get quiet over the next few days I plan to update some server software. It will hopefully have no impact on the forum but there is always the chance that something will go awry. If so I will do my best to get it back to normal again.

#5 Re: Maths Is Fun - Suggestions and Comments » Does mathisfunforum block certain IPs from access? » 2019-03-13 09:09:13

Most likely the server automatically banned your home IP address. With some internet providers just resetting the modem gets you a new IP, or else I can search the list of banned IPs to find yours.

#6 Re: Maths Is Fun - Suggestions and Comments » COntacting Math is Fun / Mathopolis » 2018-10-25 15:20:28

Hi ngolden, how can I help?

(I am not sure why the contact form is not working for you, we get plent of messages that way. I just checked and it works OK for me.)

#7 Re: Maths Is Fun - Suggestions and Comments » What is wrong again? » 2018-05-01 10:32:17

It is just the server trying to sort out spam vs real. Nothing to do with you exactly.

Without the spam protection we would be inundated with robot posts, and they come in all types so there are literally 100s of rules (you could have hit any 1 of them).

#11 Re: Maths Is Fun - Suggestions and Comments » Relativity Introduction » 2018-02-06 12:32:17

Thanks!

The reason for the little story is that most people think "Big Bang" which gives them a false idea of a central expansion point, and I want them to know the Universe is more elegant than that.

Isn't length contraction just a way of handling certain problems and not really a thing?

And how do I work E=mc² into it?

#12 Maths Is Fun - Suggestions and Comments » Relativity Introduction » 2018-02-06 11:30:50

MathsIsFun
Replies: 5

I have drafted an Introduction to Relativity: Relativity

Criticisims, correction, comments all welcome.

I want to get it right before publishing on website!

#14 Re: Maths Is Fun - Suggestions and Comments » Error » 2018-02-03 17:01:36

Yes zetafunc has it right. There are many automated spam attacks constantly going on, and the server has hundreds of rules to spot them. It simply denies. And if it gets several from the same location it will ban.

#16 Re: Maths Is Fun - Suggestions and Comments » Pythagoras' Theorem in 3D » 2018-01-23 15:10:28

Thanks ganesh!

No offence Monox! I am not sure what you mean by equal halves though.

#19 Re: Maths Is Fun - Suggestions and Comments » Banning new members » 2018-01-10 13:19:59

Exactly right.

Spam is an annoyance that we always have to fight.

But we also want to allow well established members to talk about other sites.

Imagine you are in a group of friends and someone just turns up trying to sell you something (versus a friend telling you about things).

#20 Maths Is Fun - Suggestions and Comments » Sampling » 2018-01-10 13:12:53

MathsIsFun
Replies: 3

A new page: Sampling

Comments/suggestions anyone?

#22 Re: Maths Is Fun - Suggestions and Comments » Fourier Series » 2017-12-30 09:52:24

You are welcome Bob

A side note on the grapher: you can sum any function you want, not just sine and cosine.

#24 Maths Is Fun - Suggestions and Comments » Fourier Series » 2017-12-26 12:34:36

MathsIsFun
Replies: 5

Just finished this page: Fourier Series

Please let me know what you think, and if there are any errors at all.

#25 Maths Is Fun - Suggestions and Comments » Correlation Calculator » 2017-12-22 17:22:55

MathsIsFun
Replies: 2

Have a try of the Correlation Calculator and let me know what you think.

Does it work well? Any ideas for improvement?

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