Paper of Denis Simon on quadratic equations in dimensions 4, 5?

Question

In several places I have come across references to a 2005-6 preprint of Denis Simon entitled

Quadratic equations in dimensions 4, 5, and more

This paper gives fast algorithms to find isotropic vectors in a 4 or 5 dimensional quadratic space over $\mathbb{Q}$, based on indefinite LLL.

I have been unable to get a hold of it. Is it online? Has it been published?

It seems to have been presented at a talk with the title Recent Developments in Computational Number Theory on May 20, 2005. — JRN, Commented May 6, 2015 at 1:35
@JoelReyesNoche - I've tried that but haven't heard back. (Maybe I still will...) — benblumsmith, Commented May 7, 2015 at 1:12

benblumsmith · Accepted Answer · 2015-05-25 21:51:36Z

2

It used to be on Simon's website, and archive.org saved a copy:

Thanks to Mark Watkins for pointing this out.

I have reached out to Simon to ask about it but haven't heard back, so I don't know an explanation for why he took it down.

answered May 25, 2015 at 21:51

benblumsmith

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JRN · Accepted Answer · 2015-05-06 01:46:52Z

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Click "view" on the upper right to read the paper. (I don't know if you can download it, though.)

answered May 6, 2015 at 1:46

JRN

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$\begingroup$ It seems just to be the first 5 pages, and the "external download" link is broken, but thank you! $\endgroup$
– benblumsmith
Commented May 7, 2015 at 1:13

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