Timeline for Given a positive-definite integral unimodular Gram matrix, how to find a basis of the associated lattice (over $\mathbf Q$)?
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 17, 2014 at 11:40 | comment | added | few_reps | @Oblomov : I can write you a magma function that does the full job if you need it. | |
| Dec 17, 2014 at 11:39 | comment | added | few_reps | Yes, even if it is not necessarily efficient : identify successively the spheres of square radii 1,4,9, etc. There are algorithms to do this. | |
| Dec 17, 2014 at 9:51 | comment | added | Oblomov | Ok, I know why it represents a square, but is there an algorithmic way to find such a vector? | |
| Dec 17, 2014 at 9:23 | comment | added | Oblomov | I am a bit confused by the first step. My (stupid) question is: why does a positive definite 4-dimensional integral quadratic form represent a square? | |
| Dec 17, 2014 at 9:15 | vote | accept | Oblomov | ||
| Dec 17, 2014 at 9:15 | comment | added | Oblomov | Indeed, sorry for my delay in reading your answer. | |
| Nov 26, 2014 at 8:34 | comment | added | few_reps | @Oblomov : I would not like to seem fidgety but ... after one week, what do you think of this answer ? (ok, you had to wait 2 month before getting an answer to your question, so maybe I should expect it will also ask you two month to comment on it ...) | |
| Nov 25, 2014 at 8:18 | history | edited | few_reps | CC BY-SA 3.0 |
added 480 characters in body
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| Nov 21, 2014 at 0:00 | history | edited | few_reps | CC BY-SA 3.0 |
added 172 characters in body
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| Nov 20, 2014 at 20:47 | history | answered | few_reps | CC BY-SA 3.0 |