Anjan3
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 Apr 9 accepted How to show that $\varphi(m_1)=\varphi(m_2)$ gives $m_1=m_2$? Apr 7 comment How to show that $\varphi(m_1)=\varphi(m_2)$ gives $m_1=m_2$? using Maple 14, I have checked the result is true. But theoretically I am willing to prove it. what to do ? Apr 7 comment How to show that $\varphi(m_1)=\varphi(m_2)$ gives $m_1=m_2$? In that case dear sir, I failed to prove the problem. Can you please help me ? :-( Apr 7 comment How to show that $\varphi(m_1)=\varphi(m_2)$ gives $m_1=m_2$? @AndréNicolas Basically we can show that each odd prime $p_i$ is a Fermat's prime. But without that information I am trying to complete the track. Won't it be possible sir ? Apr 7 asked How to show that $\varphi(m_1)=\varphi(m_2)$ gives $m_1=m_2$? Mar 28 accepted How to show $f$ is non-negative. Mar 27 asked How to show $f$ is non-negative. Feb 18 asked Which option should be true? Feb 11 comment For what values of $a, n$ the number $2^a\cdot 3^n+1$ is prime? @DietrichBurde So is there any site where if I put a list of values of $n$, we shall get which $2^a3^n+1$ will be prime when $a$ is given? Feb 10 comment For what values of $a, n$ the number $2^a\cdot 3^n+1$ is prime? Thank you. Suppose I want to check for $a=2$, $n=1,2,3,\cdots, 100$ how to do that ? Feb 10 asked For what values of $a, n$ the number $2^a\cdot 3^n+1$ is prime? Feb 4 asked what can we say about $\varphi^{-1}(2^a), \varphi^{-1}(2^\alpha), \varphi^{-1}(2^\beta)$ where $a=\alpha+\beta$? Jan 27 comment Could you solve $x↑^n2=x↑^m2$? What is W here ? Jan 21 revised Determine values of k for a matrix to have a unique solution $M =\left[ \begin{array}{cc} k^3 + 3k & k+5 & k+3 & k^5+(k+3)^2 \\ 0 & k & 1 & 3 \\ 0 & 0 & k^3+k^2-6k & k(k^2-9)\\ \end{array}\right]$ Jan 21 suggested approved edit on Determine values of k for a matrix to have a unique solution Jan 19 revised Show that $rank(A) \ngeq \frac{[tr(A)]^2 }{tr(A^2)}$ $rank(A) \ngeq \frac{[tr(A)]^2 }{tr(A^2)}$ Jan 19 revised Find the nth power of a matrix Added two tags Jan 19 suggested approved edit on Find the nth power of a matrix Jan 19 suggested approved edit on Show that $rank(A) \ngeq \frac{[tr(A)]^2 }{tr(A^2)}$ Jan 9 awarded Nice Question