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Template:Today in Math History for September 15
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Calendar of Today in Math History for September
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- September 15, 1782 Joseph-Louis Lagrange reports he has almost finished a treatise on mechanical physics in a letter to Pierre-Simon Laplace.
- September 15, 1830 Gabriel Lamé witnesses the opening of the Liverpool-Manchester railway line.
- September 15, 1954 Arthur Wieferich dies in Meppen.
- September 15, 2008 GIMPS announces the two largest known primes up to that time, Mersenne primes with exponents being 43112609 and 237156667 respectively.
