கேள்வி: இசுரேல் கெல்ஃபாண்ட் - மேலும் சில ஆதாரங்கள் குறித்து விரிவாக சொல்லுங்கள்.
பதில்: *[https://www.nytimes.com/2009/10/08/science/08gelfand.html?_r=1&scp=1&sq=Israel%20Gelfand&st=cse Chang, Kenneth. "Israel Gelfand, Math Giant, Dies at 96", ''The New York Times'' (October 7, 2009)] *[https://www.usatoday.com/news/nation/2009-10-09-top-mathematician-dies_N.htm "Leading mathematician Israel Gelfand dies in N.J." ''USA Today'' (October 9, 2009)] *[http://www.philly.com/philly/obituaries/20091010_Israel_Gelfand___Top_mathematician__96.html "Israel Gelfand | Top mathematician, 96". ''The Philadelphia Inquirer'' (October 10, 2009)] *[https://www.telegraph.co.uk/news/obituaries/science-obituaries/6440484/Israel-Gelfand.html "Israel Gelfand" ''The Daily Telegraph'' (October 27, 2009)]