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Bérénice

5th year at the university in mathematics. I enjoy playing with numbers in my free time sometimes.

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23 Show that the eigenvalues of a unitary matrix have modulus $1$ Mar 28 '16
17 real values of $x$ which satisfy the equation $\sqrt{1+\sqrt{1+\sqrt{1+x}}}=x$ Jun 22 '16
16 Solve $\int \frac{1}{\sin ^{\frac{1}{2}}x \cos^{\frac{7}{2}}x}dx$ Mar 21 '17
15 How to find $\int \frac{x^2-1}{x^3\sqrt{2x^4-2x^2+1}} dx$ Jul 2 '16
15 If $f\circ f\circ f=id$, then $f=id$ May 9 '16
9 Order of a center of a group is prime order Jul 14 '16
8 Let A be a square matrix of order $3$ with integer entries such that $\det(A)=1$. Jun 3 '16
7 inclusion-exclusion principle - challenging problem Apr 9 '16
7 Calculate $(1+i)^{11}$ Sep 10 '16
7 How does one evaluate $ \int _2^4\:\frac{x^4-x^2-4x-6}{\:x^4-x^2-2x}dx $? May 1 '17
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