AIM Chat with Bill Abrams , Chirashree Bhattacharya , Anne Collins , Benjamin Collins , Julianne Rainbolt , Jen Roche , Daniel Shown , Gordon Williams , Shaochen Yang .
9:51 AM
Russell Blyth: Hi all
Julianne Rainbolt: hi
Benjamin Collins: Good morning.
Russell Blyth: Buon giorno
Gordon Williams: top o' the mornin' to ya
Julianne Rainbolt: we are not broadcasting yet
Julianne Rainbolt: we'll be up soon
Julianne Rainbolt: vnc is up
Dennis Keeler has joined this chat.
Dennis Keeler: hi
9:55 AM
Russell Blyth: Video is live
Russell Blyth: 14am1
Julianne Rainbolt: QT up:rtsp://165.134.240.35/GAP060714am1.sdp
Gordon Swain has joined this chat.
Gordon Swain: Good Morning.
Julianne Rainbolt: good morning
Julianne Rainbolt: QT up:rtsp://165.134.240.35/GAP060714am1.sdp
Gordon Williams: someone's singing on your end?
Julianne Rainbolt: are you enjoying it?
Julianne Rainbolt: it is Larry
Gordon Williams: can't quite make it out
Julianne Rainbolt: vnc: 165.134.13.231
Chirashree Bhattacharya: Good morning everyone.
Julianne Rainbolt: russell turned on some music
Chirashree Bhattacharya: have a GAP ques: how do I break out of a for loop?
Gordon Williams: that's nice
Gordon Williams: od;
Gordon Williams: or ctrl-c
Chirashree Bhattacharya: yes, prematurely
Julianne Rainbolt: then the ctrl-c
Chirashree Bhattacharya: no in a subroutine
10:00 AM
Chirashree Bhattacharya: jen's sent you some subroutines by email
Russell Blyth: use break
Russell Blyth: look in vnc
Russell Blyth: section 4.19 of the manual
Russell Blyth: anyone not have video?
Julianne Rainbolt: chiru - i checked our email we just got the subroutines
Chirashree Bhattacharya: thanks
Julianne Rainbolt: we will put the subroutines on the web with your project
Tom Hoffman has joined this chat.
Russell Blyth: repeating link
Julianne Rainbolt: QT up:rtsp://165.134.240.35/GAP060714am1.sdp
Daylene Zielinski has joined this chat.
Julianne Rainbolt: vnc: 165.134.13.231
Julianne Rainbolt: QT up:rtsp://165.134.240.35/GAP060714am1.sdp
Julianne Rainbolt: we are going to start
Julianne Rainbolt: let us know if you have QT or VNC problems
10:05 AM
Brian Walter has joined this chat.
Julianne Rainbolt: vnc: 165.134.13.231
Julianne Rainbolt: QT up:rtsp://165.134.240.35/GAP060714am1.sdp
Brian Walter: thank you
Julianne Rainbolt: we are going to start with looking at some other software packages
Daylene Zielinski: Is this freeware?
Benjamin Collins: Yes, it is. I downloaded it this morning.
Dennis Keeler: there was a warning about having all the groups load by default... takes a long time
Dennis Keeler: I mean all the extra groups you can download
Russell Blyth: http://groupexplorer.sourceforge.net/
10:10 AM
Anne Collins: ooh! pretty!
Tom Hoffman: can you run it with cygwin?
Julianne Rainbolt: not sure
10:15 AM
Russell Blyth: http://modular.math.washington.edu/sage/
10:20 AM
Gordon Swain: Thanks
Julianne Rainbolt: continuing Jen and Chiru project
10:25 AM
Chirashree Bhattacharya: is there an easier way to write the group elements in terms of min gens?
Jen Roche: there is a nicer subroutine for this now
Gordon Williams has left this chat.
Chirashree Bhattacharya: not for counting yet
Jen Roche: not quite -we ran out of time for that
Jen Roche: it in the works
Jen Roche: thanks
Julianne Rainbolt: jen and chiru - any other comments
Julianne Rainbolt: ?
Jen Roche: none from me
Julianne Rainbolt: QT going
Chirashree Bhattacharya: not really, will polish it and send it to you
Julianne Rainbolt: back in QT in a minute
Russell Blyth: Video off
Julianne Rainbolt: we will start ben and tom project next
Gordon Williams has joined this chat.
Julianne Rainbolt: ok ben and tom?
Daniel Shown: rtsp://165.134.240.35/GAP060714am2.sdp
Russell Blyth: Video up
Tom Hoffman: sure
Gordon Williams: thanks
Julianne Rainbolt: gordon are you ok?
10:30 AM
Gordon Williams: yeah, had a minor system problem, decided to reboot
Benjamin Collins: OK with me.
Benjamin Collins: I want to be sure everyone knows that I did all the work on this one.
Benjamin Collins: I came up with the idea and worked a couple of examples.
Benjamin Collins: All Tom did was outline the project, write it up, find the proper GAP commands, and write the coding and decoding routines.
Tom Hoffman: It took 2 minutes
Tom Hoffman: they are at the end of the document also.
Tom Hoffman: we discuss the idea of PowerMod in another class, but it could be a larger part of this project
Tom Hoffman: most of our students don't remember it
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Tom Hoffman: encode and decode are just to get the students past technical issues
Tom Hoffman: no math involved
10:35 AM
Tom Hoffman: yes, I do, but that is cheating
Benjamin Collins: I do, too, but I had a head start.
Benjamin Collins: Double encode it, once using my public key, and once using your private key.
Tom Hoffman: Ben was faster
Benjamin Collins: I double decode it, once using my private key, and once using your public key.
10:40 AM
Benjamin Collins: Since you are the only one who knows your private key, it must have come from you.
Tom Hoffman: this is just to change strings to numbers
Benjamin Collins: I just noticed that you didn't encode an @ sign. Can't use this system to send an e-mail address.
Tom Hoffman: I thought this might be helpful so the students are all using the same scheme
Tom Hoffman: without mistakes
Tom Hoffman: I will add @ in version 1.01
Tom Hoffman: There are large primes in the list Primes2, but getting primes from a list may not be very secure
Tom Hoffman: NextPrimeInt in Gap
10:45 AM
Benjamin Collins: What, you don't like Shakespeare?
Benjamin Collins: What you're doing now is encryption, as opposed to encoding.
10:50 AM
Benjamin Collins: Bear in mind that the project was my idea, so I'm allowed to ask the question.
Tom Hoffman: I would hope to explore Fermat's little theorem and it's corollaries
Benjamin Collins: I agree with Russell. That's actually why I covered it this past spring.
Gordon Williams: and maybe the discrete log problem
Tom Hoffman: I was also thinking it would be a fun class towards the end of the semester
Benjamin Collins: Gallian has two problems with p = 37 and q = 73, which of course isn't secure at all, but is still hard to do on a hand calculator.
Bill Abrams: freshman seminar with GAP, what an interesting idea.
Tom Hoffman: Moral booster
Bill Abrams: But Maple costs money. I can give my kids GAP.
Bill Abrams: We are poor.
Tom Hoffman: aren't we all?
Dennis Keeler: FYI, if you use Maple in class, you can get a free copy and students can buy for $75.
Dennis Keeler: http://www.maplesoft.com/academic/adoption/index.aspx
Julianne Rainbolt: many of our students see maple in calc and/or linear algebra so it fits well to use this software in other courses where appropriate
10:55 AM
Benjamin Collins: GAP question: If I used InputLogTo yesterday, how do I load and process that today?
Julianne Rainbolt: use Read("filename");
Benjamin Collins: THX
Julianne Rainbolt: tom and ben any more comments about your project?
Tom Hoffman: nope
Julianne Rainbolt: stopping QT
Benjamin Collins: Thanks for doing all the work, Tom!
Julianne Rainbolt: we are going to skip sections 15 - 17
Julianne Rainbolt: and start with section 18
Julianne Rainbolt: video up
Daniel Shown: video up: rtsp://165.134.240.35/GAP060714am3.sdp
Russell Blyth: any problems with QT or VNC/
Russell Blyth: ?
11:05 AM
Russell Blyth: 18.1 now
Russell Blyth: conjecture for 18.4?
11:10 AM
Benjamin Collins: Rotation group of n-prism is isomorphic to D(n);
Russell Blyth: the group of rotations of an n-prism is isomorphic to...
Benjamin Collins: Can you tell I've been using GAP?;
Russell Blyth: 18.6
11:15 AM
Russell Blyth: 18.7
Benjamin Collins: I'm not sure you have a rotation in (1,10)(2,9)....
Tom Hoffman: Have you thought about using this for interdisciplinary projects (chemistry or geology)?
Benjamin Collins: Sorry, my mistake.
Benjamin Collins: You're rotating differently than I did.
Julianne Rainbolt: No, but that's a good idea, Tom
11:20 AM
Benjamin Collins: D(2n);
Russell Blyth: yes
Benjamin Collins: So if it's not D8, what is it?;
Dennis Keeler: It is D4 x C2
Dennis Keeler: Or as GAP calls it, D8 x C2
Julianne Rainbolt: Right 
Dennis Keeler: I think the general case may be Dn x C2
Dennis Keeler: If n is odd, Dn x C2 is iso to D(2n) (I think)
11:25 AM
Tom Hoffman: off to class
Tom Hoffman has left this chat.
Gordon Williams: when are we up to present?
Gordon Swain: These are for free use? or are some CopyRighted?
Julianne Rainbolt: we do not have your materials yet?
Gordon Williams: they are posted on the web
Gordon Williams: and we'll post the link
Julianne Rainbolt: after lunch: Gordon and Anne's projects, and sections 19-21
Gordon Williams: GAP Workshop 2006
11:30 AM
Russell Blyth: Thanks!
Gordon Williams: may post some more updates over lunch
Russell Blyth: OK!
Anne Collins: (worksheet's still a bit rough at the end)
Julianne Rainbolt: ok anne
Benjamin Collins: Thanks.
Julianne Rainbolt: what is the link anne and gordon?
Russell Blyth: Video down
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Julianne Rainbolt: never mind russell has it
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Gordon Williams: it's about 6 lines up on the chat
Julianne Rainbolt: sorry
Gordon Williams: np
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Gordon Williams: we also have some prepared comments to go with it
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Russell Blyth: VNC will go down
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11:40 AM
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11:45 AM
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