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Does the following exist, and if not, does anyone besides me wish it did? A web site where a mathematician (say) could find other mathematicians who want to study the same book or paper, and arrange to meet via videoconference, and run their own informal seminar around that topic, and then disband when they're done.

The reason I ask is that I have plenty of material I'd like to learn this way. I have an interesting job in industry, with occasional mathematical challenges, but there are more topics I would like to learn outside of work, and that I didn't get a chance to cover in grad school. I live near two major universities, and they do offer some interesting courses I could audit, but I'd rather focus on the exact material I want to learn.

One reason such a site might be successful (or, more precisely, popular) is that I expect academic mathematicians and grad students would find great use for it as well, since it can be hard to branch out to new areas on your own, if your own department doesn't overlap enough. If you have a deep professional network in the math community, you are probably better off, but not everyone is in that position for one reason or another.

I expect such a site, if it doesn't exist today, wouldn't be hard to create. If the videoconferencing portion was done outside the site using Skype or another service, then the site would just have to match up the groups, and maybe offer other features to support a running seminar. It would basically be a specialized social networking site, or maybe even an application within an existing site like Facebook.

UPDATE 1: The more I think about it, the more I think meetup.com is a good fit too, since it already has the calendaring and rsvp-ing features. The downside is that each seminar would probably have to be a separate meetup, and meetup.com is sort of tied to geography.

UPDATE 2: I have spent a lot of time looking for good, free, non-sleazy video streaming services, and I ended up at livestream.com. They have a couple key features. They offer a free plan with a reasonable business model behind it (the "freemium" model with a paid tier and a free tier that shows ads to viewers, though I haven't seen what these ads look like yet). They have Mac and Windows client software that lets you use your webcam OR stream your desktop, the latter of which I think is very important as a replacement for a physical blackboard or whiteboard. The other piece I have been researching is drawing on the screen with a pen. The best solution I have found is slightly sub-optimal: this pen or this one. They are similar in that they are standard ink pens with a wireless transmitter, and you clip a receiver to the paper and then write normally. The notes are either saved as images (the primary use case), or if you have a recent version of Windows, it can activate the pen features of the OS and you can draw directly into OneNote and other similar programs. This latter is what I want -- the seminar speaker can write on a paid of paper, and the remote attendees will see the writing rendered in real time on their screen. The problems are several: the pens cost at least $50-$60, I haven't tested them, reviews are scarce and Mac reviews are even scarcer. Most digital pen enthusiasm is focused on the Livescribe pen, which is strictly for saving notes and audio for later, and does not transmit in real time. Lastly, I also found this chat software that supports audio and a whiteboard, and which is free. By the way, these pens all look really great for students, especially the Livescribe, because it syncs the audio with the notes, so you can play it back and know what was being said when something was written. And you can convert a session to Flash and upload it as a "pencast". I think pencasts could really be wonderful for mathematics presentations that are recorded offline and then uploaded for an audience to learn from asynchronously.

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    $\begingroup$ You might have more luck with WebEx or GoToMeeting than Skype. $\endgroup$
    – Steve Huntsman
    Commented Mar 24, 2010 at 3:52
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    $\begingroup$ This "online reading group" sounds like a great idea. If this doesn't exist, someone should start a website like this. Besides the many academic uses, it would be useful for many groups of people too. E.g. Gamers: discuss strategy or the results of the last game Forum users: video debates or discussions instead of a text-only forum Musicians: discuss/perform music over video $\endgroup$
    – Rune
    Commented Mar 24, 2010 at 14:40
  • $\begingroup$ The question is very interesting I find. I am talking about: "... a web site where a mathematician could find others who want to study the same book or paper, and arrange to meet via videoconference, and run their own informal seminar around that topic, and then disband when they're done." As I understand it is has not really been answered yet (though lots of people gave very useful tips on how to run one such seminar technically). I think such a webpage would be of interest to many mathematicians. I wonder if the situation about such a "maths seminar aggregator" has has evolved since. $\endgroup$
    – hce
    Commented Sep 17, 2010 at 13:48
  • $\begingroup$ The aggregator itself would not be the hard part. But, as you see from the other answers, the real problem is how to do the actual seminar once people are gathered together online. $\endgroup$
    – Andrea Ferretti
    Commented Sep 17, 2010 at 14:58
  • $\begingroup$ This is true. Maybe it could already be interesting to have an aggregator for matching pairs of mathematicians interested in learning the same subject/paper/groups of papers. Limiting the interaction to two people would make it immediately feasible, e.g. with skype. I guess there is no critical mass of potential users though, otherwise this would probably have been done already. Besides, if there was such a website already, someone would have mentioned it here. Which answers the OP's question in the negative. $\endgroup$
    – hce
    Commented Sep 17, 2010 at 16:15

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I do not see much of a point in seeing people's faces and with full video either resolution is low, or jittering or the badnwidth is huge. So the solution is to have a simultanous voice and shared white board, which should be controlled by the individual elctronic tablet devices (mouse is not good for drawing). The electronic pen on the tablet is giving a one-dimensional (possibly with described path width, color etc.) trace, so if one just transmits the changes with the same resolution it amounts to many orders of magnitude lower data bandwidth.

It would be nice to have (and it is easy for professionals to create such a thing) a software for recording the lectures in a format which would include just the voice and the electronic pen on tablet path with the timing information on the movement of the pen path synchronous with the voice. I do not know which voice and whiteboard formats would be based on such synchonous timing information interspersed with audio and new path information. Of course one should be able to erase, and do the recording in chunks. Application which would be a viewer for such recording would be like a video but having a far higher resolution with smaller memory used as only 1-d information is added and most of the rest of the picture is static; and the voice is not that big of a deal. This kind of setup is a must for mathematical community. Many mathematical centers do big efforts to make videos where the focusing, jittering, shade and other problems as well as the mere size of video files make it impossible to be in good resolution and not hugely expensive or of big memory size. The sound + timed chalk/pen-path solution is much cheaper and scalable to hi resolution at present level of resources and technology.

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  • $\begingroup$ I have a friend at work with a digital pen that can upload a digital bitmap of what he wrote in his notebook all day. I'm going to google a bit and see if there's a real-time version of this. Then, you could have the scenario you describe: an audio link to everyone, and they could be watching a blank page that you're writing on in real time, like a transparency. $\endgroup$
    – Greg
    Commented Mar 25, 2010 at 2:00
  • $\begingroup$ The kind of thing you describe (recording audio and tablet movements) is what we did at the italian olympic stages, and I think they still do this. I don't know about streaming and possibly working together in such a context, but I can ask them what software do they use (I haven't been doing this stages for a while). $\endgroup$
    – Andrea Ferretti
    Commented Mar 26, 2010 at 14:15
  • $\begingroup$ Please do, maybe there is something what is adaptable without huge effort. $\endgroup$
    – Zoran Skoda
    Commented Mar 26, 2010 at 14:37
  • $\begingroup$ I made this answer the official one, even though there's no real answer in the sense that we're really just exploring how we would do it. But Zoran made what I think is the crucial point that video is not as important as writing. Zoran, do you realize that in my Update 2, I learned that the Livescribe pen does exactly what you propose, but in an offline manner? That is, it records audio and penstrokes and synchronizes them for playback as a "pencast." $\endgroup$
    – Greg
    Commented Mar 26, 2010 at 20:28
  • $\begingroup$ Hey, this is a great information Greg! $\endgroup$
    – Zoran Skoda
    Commented Mar 29, 2010 at 19:09
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The idea is very natural. We are regularly using webex (webex.com) for seminars and interactive lectures. It works very well but it is commercial. Webinar system for math should have 1. good scalable write board 2. option to share .pdf and to write on it 3. good recording for the meeting. In low price or free systems something is lacking.

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  • $\begingroup$ Aah yes, let me highlight a point Nikolai makes: my experience from informal reading seminars "1990s style" (i.e. you all meet up in a real room together and read the paper) is that occasionally people want to sketch ideas on a black/whiteboard so that everyone can see and contribute. With Access Grid you can use an electronic whiteboard, or a normal whiteboard plus some "magic pens" that somehow broadcast their location and a computer and pick it up and make an electronic copy of the board to broadcast. This will be a big problem if you just want to use Skype. $\endgroup$
    – Kevin Buzzard
    Commented Mar 24, 2010 at 16:38
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    $\begingroup$ [the reason it's a big problem is that webcams are REALLY BAD at picking up whiteboard detail] $\endgroup$
    – Kevin Buzzard
    Commented Mar 24, 2010 at 16:39
  • $\begingroup$ Those sound like very good requirements to keep in mind, Nikolai, thanks for sharing your experience. I was imagining using skype's new screen-sharing feature as a digital whiteboard (which would be harder to draw on, but could also be typed on, or used to show a web page just as easily), which I use with my work colleagues all the time. But it's 1-on-1 only, not broadcastable to a group. $\endgroup$
    – Greg
    Commented Mar 24, 2010 at 17:55
  • $\begingroup$ It would be useful to add technical experience with whiteboards for conferencing to the wiki here: azimuthproject.org/azimuth/show/Remote+conferencing $\endgroup$
    – Zoran Skoda
    Commented Jul 3, 2011 at 13:38
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Last (academic) year I organised a video seminar. We didn't use Skype; we used some gadgetry called an "Access Grid room". This is some kit which is installed in a lot of universities in the UK and, I believe, across the world. Ultimately at least 20 universities in the UK were capable of connecting to one another and listening to the speaker.

http://www2.imperial.ac.uk/~buzzard/maths/videoseminar.html is a link to the seminar.

Here is a summary of how it worked: the speaker had to be in an Access Grid room. If the audience wanted to be seen and heard, as well as seeing and hearing, they also had to be in an Access Grid room, although this Access Grid room did not of course have to be the same one as the speaker. Access Grid rooms with people in were videoed and the streaming video from each room, plus sound, was broadcast in each of the other rooms (typically on the back wall, so the speaker could see his audience, and then, behind them, 10 more audiences). However, if you just wanted to lurk, you could do so from the comfort of your own home, as long as you had a broadband connection. This is perhaps not quite what the questioner had in mind---for example with skype you'd presumably be able to contribute from home---but it's just a data point to suggest that stuff the questioner is suggesting is already happening.

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  • $\begingroup$ How well did it actually work? $\endgroup$
    – Felipe Voloch
    Commented Mar 24, 2010 at 15:13
  • $\begingroup$ It worked really well. I wanted to organise this from the moment we had the room installed, but I waited, because I knew there would be teething trouble. I ran the seminar after the system had been in place for 1 year and at least one of the grad students here were fully versed in its subtleties. The grad student would show up at the beginning of each seminar to check everything was OK. There were still occasional problems but on the whole everything went absolutely fine. Let me stress though that it's a lot of kit---electronic whiteboards etc etc---so perhaps it's not a surprise that it works $\endgroup$
    – Kevin Buzzard
    Commented Mar 24, 2010 at 15:30
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    $\begingroup$ This is great, especially if the video is archived for later viewing. I wish more videos like this were put on iTunes U, instead of the mostly undergraduate offerings they have there. $\endgroup$
    – Greg
    Commented Mar 24, 2010 at 17:56
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look @ this website http://www.twiddla.com/ . you can use it with your tablet and also has latex capability as well

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Consider a version of your idea that does not use the word video.

Back in 1997, I contemplated holding a general algebra seminar using IRC (Internet Relay Chat). While I thought that the ASCII-only medium would be limiting, at that time I saw that it could be combined with .jpg sharing and using a common web page to communicate ideas that weren't nicely formed from an ASCII character set. I decided that with sufficient preparation and willingness to work with the technology, I could pull off some decent presentations, since much of what I wanted to say was with words, supplemented with a few diagrams.

In this millenium, the software gives some more power and flexibility of expression, but unless you want to talk primarily in pictures, consider how your seminar might go if your bandwidth was limited to, say, sending 8 pictures. This can help one focus on the goal of communication, rather than seeing what degree of flash and coolness can be accomplished.

The other point of the consideration comes from the fact that chat communities formed quickly and segregated quickly, so I was able to go to #math (an IRC channel) and look for a target audience more easily. I think the issues are : 1) Finding an online community, and 2) getting enough of that community to agree on common goals for such a project. What technology you use and what shortcomings it may have will be minor obstacles to a group that dedicates itself to sharing and creating knowledge.

Regarding issue 1), there are enough communities now and means of asking for participation that finding such a group should not take long. USENET news, IRC, social networking sites, mailing lists, blogs and forums are prevalent; spending a couple hours with these should get you underway towards building the specific community you want. Issue 2) can be resolved by the degree of creativity, flexibility, and fun you bring to the process.

Here's a thought: Can Math Overflow have or support such a category like Announcements? It could be a button next to the Questions button, so that people could post brief announcements and reading group requests? Off to meta.mathoverflow.

Gerhard "Ask Me About System Design" Paseman, 2010.03.24

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it seems that google wave will be capable of something like this in the future (hopefully not too distant), maybe even already... My thoughts are that you could have one person giving a lecture live via video and have discussion underneath, but maybe this is just ustream... so you should prolly check that out...

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The software Elluminate Live is quite impressive, permitting simultaneous text-chatting, video, audio, and a nice whiteboard that onto which all participants can write and deposit images. All aspects are optional, i.e., some can participate only via text, some also with video and/or audio, etc. It is—alas—a commercial product. No doubt analogous software either is already or soon will be available free.

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