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Officials say Matti Juhani Saari began firing in a classroom at the college before shooting himself.
CNN: Finnish gunman kills 10 at college
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Authorities learned about the videos Friday but could not reach Saari until Monday, Paatero told YLE.
CNN: Finnish gunman kills 10 at college
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Over the course of 90 minutes, Saari fired a few shots at police, Finnish broadcaster YLE said.
CNN: Finnish gunman kills 10 at college
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Police had interviewed and released Saari on Monday after he posted violent videos on YouTube, authorities said.
CNN: Finnish gunman kills 10 at college
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Essentially, says Dr Saari, voting paradoxes arise when the system fails to respect natural cancellations of votes.
ECONOMIST: The mathematics of voting
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Dr Saari's results can also be generalised for elections with more than three candidates using more complicated, but closely related symmetries.
ECONOMIST: The mathematics of voting
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Saari, 22, died Tuesday afternoon from a self-inflicted gunshot wound to the head at Tampere University Hospital, said medical director Matti Lehto.
CNN: Finnish gunman kills 10 at college
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Having read Dr Saari's results, they should now be merrily quaffing wine.
ECONOMIST: The mathematics of voting
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As Saari did not directly threaten anyone in the videos, there were no grounds for further action, national police Commissioner Mikko Paatero told YLE.
CNN: Finnish gunman kills 10 at college
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The fairest voting system, says Dr Saari, would respect both symmetries.
ECONOMIST: The mathematics of voting
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Four videos of a man firing a pistol at a shooting range were posted by a "Mr. Saari" from Kauhajoki, where the college is based, according to his YouTube profile.
CNN: Finnish gunman kills 10 at college
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In a paper just published in the journal Economic Theory, Donald Saari, a mathematician at Northwestern University in Evanston, Illinois, claims to have got to the root of the problem.
ECONOMIST: The mathematics of voting