[sage-support] How to efficiently generate all graph isomorphism classes of a given size?

2023-01-30 Thread Shiyue Li
Hi all, I am hoping to generate a list of all graph isomorphism classes of a given size. The current code that I have first generate all the graphs on 2n, and then take all the isomorphism class representatives of size n. But the first step of generating all graphs on 2n vertices can take a

Re: [sage-support] Cannot factor 71281426948143699070565 with ecm.factor()

2023-01-30 Thread Dima Pasechnik
On Mon, Jan 30, 2023 at 5:29 PM kcrisman wrote: > > Is there any notion that the default should be changed, or is that pretty > unique to this example? IMHO a small default is not expensive, as checking for smallish prime factors should be quick. But perhaps I'm missing something here. Dima >

Re: [sage-support] Cannot factor 71281426948143699070565 with ecm.factor()

2023-01-30 Thread kcrisman
Is there any notion that the default should be changed, or is that pretty unique to this example? -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to

Re: [sage-support] Cannot factor 71281426948143699070565 with ecm.factor()

2023-01-30 Thread William Stein
I think everybody understands what's going on regarding ECM now, thanks to Dima's quick answer. Paul Zimmerman who wrote this code (and reads sage-support via a daily digest), sent me this note to pass on as well: " Hi William, please can you forward my answer below? Thanks, Paul

[sage-support] Re: Cannot build Sage 9.8 on Ubuntu 22.04.1 LTS

2023-01-30 Thread Matthias Koeppe
Disable Anaconda and read what "./configure" says at the end (these messages are for you) On Sunday, January 29, 2023 at 2:07:52 PM UTC-8 hyunjo...@gmail.com wrote: > Hello, > > I've been trying to build Sage 9.8 from source for development; I had > previously done so months ago, but I had not