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Rodrigo de Azevedo

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Some answers I particularly enjoyed writing:

  • How to prove that a $3 \times 3$ Magic Square must have $5$ in its middle cell?, Mathematics, May 18, 2016.

  • How to reduce the low-rank matrix completion problem to integer programming?, Computer Science, April 18, 2017.

  • Matrix exponential via Euler's formula, Mathematics, November 23, 2020.

  • Toeplitz matrix nearest to a given (symmetric) matrix, MathOverflow, March 15, 2018.

  • Writing $(x^2 + y^2 + z^2)^2 - 3 ( x^3 y + y^3 z + z^3 x)$ as a sum of two squares of quadratic forms, Mathematics, September 3-8, 2017.


Profile picture courtesy of Erik Rauch.

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