Template:Selected anniversaries/October 8

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  • 1942: Physicist, mathematician, and engineer Sergey Chaplygin dies. He is known for mathematical formulas such as Chaplygin's equation, and for a hypothetical substance in cosmology called Chaplygin gas, named after him.

    1942: Physicist, mathematician, and engineer Sergey Chaplygin dies. He is known for mathematical formulas such as Chaplygin's equation, and for a hypothetical substance in cosmology called Chaplygin gas, named after him.

  • 1985: Mathematician, cryptographer, and author Gordon Welchman dies. During the Second World War, he developed traffic analysis techniques for breaking German codes.

    1985: Mathematician, cryptographer, and author Gordon Welchman dies. During the Second World War, he developed traffic analysis techniques for breaking German codes.

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