I see some references to him on the internet, but he hasn't been on the forum for years. I hope all is well... what a really nice guy. We exchanged calculators, correspondence, and even some phone calls.
... and there are some tasks where their help would be appreciated. Luiz announced he was going to have a lot of work. I have no similar information from Valentin.
I keep in touch with Valentin. He has been under a lot of pressure at work over the past few months, but other than that, I believe he is doing just fine.
I expect to see him personally next week, in case you want me to convey any messages.