Rodrigo de Azevedo
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 lowrank matrix completion problem to integer programming?, Computer Science, April 18, 2017.
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 38, 2017.
Profile picture courtesy of Erik Rauch.

Europe

Member for 3 years, 5 months

5 profile views

Last seen yesterday
Communities (65)
 Mathematics 13.8k 13.8k 44 gold badges2323 silver badges6767 bronze badges
 MathOverflow 2k 2k 22 gold badges99 silver badges2222 bronze badges
 Chemistry 1k 1k 1010 silver badges1717 bronze badges
 Aviation 914 914 11 gold badge66 silver badges1919 bronze badges
 Stack Overflow 820 820 66 silver badges1717 bronze badges
 View network profile →
Top network posts
 75 Is "The empty set is a subset of any set" a convention?
 73 Why are some coins Reuleaux triangles?
 43 The relation between trace and determinant of a matrix
 33 How to prove that a $3 \times 3$ Magic Square must have $5$ in its middle cell?
 30 What is a realworld metaphor for irrational numbers?
 19 Are two sequences equal if the sums and sums of squares are equal?
 View more network posts →
Keeping a low profile.
This user hasn't posted yet.
Badges (6)
Gold
—
Silver
3
Rarest
Bronze
3
Rarest

Dec 2

Sep 8 '16

Sep 8 '16