I've just received an email stating that the artist "Matthias Ostermann ended his battle with HIV induced lymphoma yesterday at Royal Victoria Hospital in Montreal. As was his wish there will be no memorial, although celebrations of his life are encouraged. A full obituary graciously written and provided by his longtime friend and art dealer Suzann Greenaway is available on PRIME's website."
There are also images of an exhibition of his work at Prime from January of this year.
Photographs of Matthias Ostermann and his work are available at his web site as well at www.matthiasostermann.com