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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -




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Topic review (newest first)

2013-05-30 02:11:50

Many of them. Particulary the ones that have a mythological background.

2013-05-30 02:10:44

Lord Voldemort

Have you read any popular superhero stories?

2013-05-30 02:05:46

Yep, I have never heard of him.

2013-05-30 02:03:57

Tom Marvolo Riddle = I Am Lord Voldemort = Immortal Odd Lover

2013-05-30 01:47:15


No, I do not know that fellow.

2013-05-30 01:42:19

You do not know who -He who must not be named- is?

2013-05-30 00:15:38

That is because I have never read those books.

2013-05-30 00:06:56

I can't believe you don't know who he is

2013-05-30 00:03:19

Voldemort? Sounds like a French cheese.

2013-05-29 21:41:03

bobbym wrote:


The PSLQ? That is an interesting story. Some would call it a rant.

As you should know there are a couple of discoverers of the algorithm. There is an implementation of it on the net but as usual it does not work. My brother and I spent a long time trying to debug it but this was one time "the human debugger" failed.

So off I headed to M land to see what the experts knew. I posted a request for a PSLQ that worked and was written in M. I got one reply from you know who. Now this guy is a big brain who knows everything. He remembered me because I had posted bobbym's integral there and he had failed to solve it. This irked the mighty genius and he demanded that I grovel for the PSLQ.

I was willing to bow long and low until he asked me my favorite question... Then I snapped and replied in a smart alecky way. Needless to say I did not get the implementation that day.

My brother the matrix master was fooling around with a cross product routine that would sometimes solve the PSLQ and sometimes not. That is where I got the idea for mine. It works! I do not know why but I am not the type to argue with success. Pretty boring story...

What was your favorite question?

2013-05-21 12:28:28

Yes, post #3 is doing a rootapproximant using a PSLQ.

2013-05-21 12:27:03

Okay but is it related to root approximant?

2013-05-21 12:08:37

It uses something called Lattice Reduction. Exactly how this works I can not explain. In more general terms it is a way to intelligently guess, with a high probability at what constants make up a decimal.

2013-05-21 11:40:40

How does this work?

2013-05-21 00:58:33

It is an extension of the extended GCD. Where the extended GCD solves ax + by = c, the PSLQ solves

and it solves it in such a way that the
are integers. It was called the most important algorithm of the 20th century.

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