The following story appears in George Gamow's memoir My World Line:
Here is a story told to me by one of my friends who was at that
time a young professor of physics in Odessa. His name was Igor Tamm
(Nobel Prize laureate in Physics, 1958). Once when he arrived in a
neighboring village, at that period when Odessa was occupied by the
Reds, and was negotiating with a villager as to how many chickens he
could get for half a dozen silver spoons, the village was captured
by one of the Makhno bands, who were roaming the country, harassing
the Reds. Seeing his city clothes (or what was left of them), the
capturers brought him to the Ataman, a bearded fellow in a
tall black fur hat with machine-gun cartridge ribbons crossed on his
broad chest and a couple of hand grenades hanging on the belt.
‘You son-of-a-bitch, you Communist agitator, undermining our Mother
Ukraine! The punishment is death.’
‘But no,’ answered Tamm, ‘I am a professor at the University of Odessa
and have come here only to get some food.’
‘Rubbish!’ retorted the leader. ‘What kind of professor are you ?’
‘I teach mathematics.’
‘Mathematics?’ said the Ataman. ‘All right! Then give me an estimate
of the error one makes by cutting off Maclaurin's series at the !!n!!th
term. Do this, and you will go free. Fail, and you will be shot!’
Tamm could not believe his ears, since this problem belongs to a
rather
special branch of higher mathematics. With a shaking hand, and under
the muzzle of the gun, he managed to work out the solution and handed
it to the Ataman.
‘Correct!’ said the Ataman. ‘Now I see that you really are a
professor. Go home!’
(However, Dam Thanh Son has found and translated a more reliable
version of the same
story,
from the memoirs of Tamm's grandson, L.I. Vernsky.)
Once when I was telling this story to some friends, I got to the part
where the Ataman issues his challenge: “‘Calculate the error when the
Maclaurin series is truncated at the !!n!!th term… OR DIE!’” This
caught the attention of Katara, who was with us, then around fifteen months
old. She perked up and proclaimed “AWW DIE!!!”
For the next few weeks she would startle us by
interrupting whatever else was going with “AW DIE!”
This is why you need to be careful what you say around an
impressionable child.
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