Dear Joseph, Dear Andrey, thank you for your letter; however, in my case the main problem is presently not the monetary costs of travel, but rather the visa application procedures. I have neither spare time nor energy to spend on filling forms, standing in queues, answering absurd questions, and satifying bureacratic requirements. That it the reason why I am now rejecting most invitations involving visa application in advance of travel, including all invitations to the UK. Should a pressing need to listen to a talk of mine or otherwise meet me in person for research purposes arise, you are welcome to invite me to a country imposing no advance visa application requirement on the Russian passport holders. Here is a public statement expressing my point of view: http://posic.livejournal.com/863098.html Sorry for being unable to participate on this occasion. Sincerely, Leonid Positselski [Это ответ на приглашение приехать на три дня в Лондон в конце июля следующего года.] Update: ранее на ту же тему -- http://posic.livejournal.com/891203.html http://posic.livejournal.com/835740.html http://posic.livejournal.com/815017.html http://posic.livejournal.com/812457.html