Math and Computer Science: hi, silvia! Silvia La Falce: Hi! I'm glad I'm back! Math and Computer Science: so are we Juli Rainbolt: stand by - nothing is broadcasting yet Donna Nonnenkamp: Silvia was it your network card Dominic Soda has joined this chat. Silvia La Falce: it seems that the computer lost power overnight brooksbankpa has left this chat. Tracy Hamilton has joined this chat. Silvia La Falce: and that messed up the setup. The IDE controller was somehow messed up brooksbankpa has joined this chat. Silvia La Falce: and there were tons of conflict with the different devices. Silvia La Falce: Now everything seems to be OK Donna Nonnenkamp: good silvia Juli Rainbolt: vnc has started 2:25PM Juli Rainbolt: quicktime has started Meral Arnavut has joined this chat. janetlbeery has joined this chat. sklarjk has joined this chat. 2:30PM Dominic Soda: It is getting very dark again Donna Nonnenkamp: video is rtsp://165.134.240.33/video0718p.sdp and audio is rtsp://165.134.240.33/audio0718p.sdp 2:35PM Dominic Soda: The "fancy calculator" helps cement some of the concepts Robert Talbert: What's the learning curve for GAP been like on the students' part? I am assuming they have experience with maple/mathematica types of programs -- does it take them Robert Talbert: a while to get the hang of GAP? Dominic Soda: Can students use GAP on tests? Robert Talbert: I.e. how long does it typically take them to get fluent with GAP? 2:40PM Robert Talbert: well, in a relative sense Ken Yanosko: Do your students download their own copies of GAP? Could I reasonably ask them to do this and expect them to use it for regular homework? Carter Lyons: Over the past several years I have been giving a takehome part to every inclass exam. The takehome part is due one week after the inclass exam. I am hoping to implement GAP on the take home parts. Peter Brooksbank: do you have some examples of these questions Russell? 2:45PM Ken Yanosko has left this chat. 2:50PM Ken Yanosko has joined this chat. Dominic Soda: I think GAP will help with applications like RSA Encryption Janet Beery: That was very helpful. Thanks---although I'd still like to know what your favorite projects are! 2:55PM Robert Talbert: dominic -- RSA could be a little tricky with GAP because raising numbers to very large powers doesn't always work... Peter Brooksbank: yes -- it introduces groups in a very concrete setting. Robert Talbert: I just tried raising a four-digit number to a 13-digit number power and it wasn't happy. Donna Nonnenkamp: changing the battery in the microphone Robert Talbert: Unless there is a "PowerMod" command like on mathematica, doing authentic RSA calculations may not be possible. Dominic Soda: There is a power mod function Peter Brooksbank: Modular exponentiation is fine in GAP I think. Ken Yanosko: There is something like that, but I forget what it is. I have done this in Number theory classes. Robert Talbert: Hey, it Robert Talbert: Hey it's "PowerMod". How about that. Ken Yanosko: PowerModInt 3:05PM Ken Yanosko has left this chat. Math and Computer Science: That was Ken calling - his LAN went down suddenly. We hope he will return shortly 3:10PM Dominic Soda: I'm not sure I follow how you chose the generators? Dominic Soda: yes Dominic Soda: Is my diagram different? Math and Computer Science: perhaps it is - Juli has an exact copy of the diagram Math and Computer Science: on the board Carter Lyons: Maybe drawng the axes of rotation will clear it up. Dominic Soda: I was looking at the picture differently thanks 3:15PM Tong Wu has joined this chat. Dominic Soda: Labeling front and back would help I had them reversed Math and Computer Science: Tong, Juli is on Section 15, 15.1- 15.5 are done, Math and Computer Science: She will start 15.6 next Donna Nonnenkamp: changing tapes Donna Nonnenkamp: new tape installed --thanks for your patience Tong Wu: Thanks, We had a meeting Peter Brooksbank: In 15.7, should the 5 be a 10? i.e. S_{10}? Math and Computer Science: yes Peter Brooksbank: thanks. Math and Computer Science: Thank you! Donna Nonnenkamp: Tong video is rtsp://165.134.240.33/video0718p.sdp and audio is rtsp://165.134.240.33/audio0718p.sdp 3:20PM Tong Wu: I got the video 3:25PM Janet McShane: In front of the last 7 Silvia La Falce: you have an extra ( before the last 7 3:35PM Dominic Soda: is the index zero based? Dominic Soda: thanks Peter Brooksbank: Conjecture: for the n-prism, symmetry group is D_n if n is odd, and D_{n/2} x C_2 if n is even? Dominic Soda: Can you force the groups to be perm groups? Dominic Soda: I'll look Peter Brooksbank: GAP likes PC groups best of all. But you can use IsomorphismPermGroup( <gp> ) to get the image of your generators in some permutation domain. 3:40PM Peter Brooksbank: Oh I think you have to use the Image command or something...I'll play. Robert Talbert: Image did it. Dominic Soda: Thanks Peter Brooksbank: great Peter Brooksbank: you can use SmallerDegreePermutationRepresentation, Ken Yanosko has joined this chat. Donna Nonnenkamp: Hi Ken Math and Computer Science: welcome back, Ken Math and Computer Science: Juli is about to start section 17 3:45PM Ken Yanosko: thanks Peter Brooksbank: it says <action epimorphism> which leads me to believe it doesn't always give you a faithful rep, but it appears to in this case. Math and Computer Science: I sent the manual entries to the list 3:50PM Math and Computer Science: Anticipating a question - Section 37.16 gives a list of various subgroup series that GAP computes 3:55PM Silvia La Falce: are you planning in making the audio and/or video available as well in the future? Silvia La Falce: thanks! Peter Brooksbank: Everyone at St Louis: thanks so much for all your hard work; it's been a very informative workshop. Dana Vazzana: hear, hear Dominic Soda: Thanks for this great workshop! Janet Beery: Applause from participants Jessica Sklar: Thanks! Robert Talbert: <*applause*? Meral Arnavut: Thanks! Silvia La Falce: Thanks so much! How do we applaude in IM? Ken Yanosko: Yes, thank you all. Robert Talbert: I mean <*applause*> Tracy Hamilton: thanks great work Carter Lyons: Good Job all around! Janet McShane: Many thanks! Janet Beery: Thank you very much! I'm sure I'll have many more questions as the fall semester approaches... Jessica Sklar: Bye! Tracy Hamilton: See you in January! Tong Wu: Thanks!Back to Home Page

*This PREP workshop is made possible by the NSF grant DUE: 0089005*