 I'm here with Harald Helfkott in Cusco and maybe you can explain to us why you're here and why we are both here. Yes, so the SAGRA tool, SAGRA is a series of winter schools that are just starting with the support of, well not just the support but it's an ICTP Simpa school besides counting with the support of the local institution that hosts it. The first SAGRA was in Santiago de Chile three years ago and now we are doing it in Cusco. Our aim is for it to rotate across South America or Latin America in general perhaps. And I understand that you are the initiator originally and perhaps you could tell us what motivated you and how you view these schools and their role they play. Yes, so I got started three years ago. I had a grant and I could use once but then we got quite a few, quite a bit in the way of local funds and this time around we got quite quite a lot of support from ICTP and also Simpa and also the local institution in SAGRA. So the aim of these schools is to really bring together number of theorists in Latin America, people in group theory also, related fields and well but since it's a school the primary aim is to educate students if I may say so. It's really to serve students. We select students from over Latin America, also students from elsewhere can apply and they are very welcome and we also provide them with housing. And I think there, well of course there is some numbers here in Latin America and Latin American numbers here is subroad but we do need I believe to put them in one place for things to develop and for an actual school to get started. And my understanding is that you grew up in Peru? Yes, I was born and grew up in Peru, in Lima but Cusco is more placent and more manageable in some ways. I think that everybody from Lima will agree. And how do you feel that being back in Peru in a completely different role? For me it's very pleasant to be able to complete it. And well I proved something a couple of years, two years ago that got some local press exposure and that helped me to get some funds to get local funds and so on. Two years ago the University of Cusco made me an honorary professor and so that made me semi-local and it really helped me to get things started. And you plan these schools to continue say? Well of course, that's a plan, yes. Every couple of years? That's right. And you have some ideas of where it might be next? Well right now we're looking at two very interesting proposals from Rio and from Córdoba, in Brazil and Argentina respectively and then there are some other further possibilities. We haven't got many people, the first time around we had one person from Mexico, now we have several, perhaps we should expand into Latin America in general, not just South America. So another interesting thing about the school is that it was chosen so that all lecturers and all courses are in fact given in Spanish. Yes that I think is crucial. We really want to reach all qualified students for interest numbers here in Latin America. Well most of them can read mathematical English of course, almost all of them, but having a lecture in one's native language shows a great deal. And of course non-native speakers are also welcome and there were several here. Yes so that's something I thought I would point out that at least maybe even half of the actual courses are given by people that are Spanish is not their native language. Exactly, but they speak it well, well enough certainly. So it's actually much better to listen to somebody give an engaging lecture in Spanish with an accent than to give them to, for most students listening to a lecture in a foreign language just adds an extra layer of difficulty to what is already a very difficult subject. And there's also not only people that are lecturing that Spanish is not the first language but people in the audience. Yes that's right, we welcome them all and so we have of course Brazilians, but even a couple of people from elsewhere say an Iranian student who's studying in Brazil now, she also came here and of course she's already familiar with Portuguese and my own student who is originally Russian, she learned enough Spanish in a surprisingly short span of time and she seems to be doing the conference. And the Brazilians are supported by Brazil. Yes that's right, that has actually helped us a great deal because they got their travel, they have their DM and their lodging is covered by that. And the courses are also being filmed so that people could look at them much later and also obviously in Spanish so it creates a whole sort of set of lecture notes in Spanish which is pretty unusual. Exactly, we asked for all lecturers to give us a lecture notes in advance and we have put them on the web, we are going to print them informally very soon, perhaps they will become an officially printed set of lecture notes later and I think that will be a, if I may say so, a valuable addition to the literature especially in Spanish. But also the courses themselves have been filmed which will... Yes of course, so it's some sort of triple experience. I mean for a difficult subject I think if one is serious about having students understand most of it and really really go back home considerably stronger in the field than they can. Just lectures is not quite enough. One should make notes accessible before thereafter and also have things to be filmed. Not just the lectures will be accessible to people who are not here but so that people who came can review them. And maybe we could end with a little description of your career path and maybe where you're based now. Yes, so I was born here, I finished high school here, well then I went to the States with a scholarship and I got my PhD from Princeton in 2003. Then I hopped around with postdocs in the first job and ended up at CNRS in France where I have spent five years but now I will... I have just started a new job in Göttingen in Germany. I'm still... I'm only from CNRS so I haven't cut off my ties to CNRS at all but I'm excited to open a new chapter of my academic life in Göttingen. Very good, best of luck to you and we'll see you again in two years in the new agrar. Well, thanks to you and I hope you're also enjoying the food which is being provided by the National Academy of Sciences of Peru. Of course, it's been... I can testify that the courses and the food have been excellent. Well, I'm very glad that that's your opinion, that's also my opinion. Not about my own course but about all the others. Very good, so bye-bye.