grandes-ecoles 2023 QIV.3

grandes-ecoles · France · x-ens-maths-d__mp Groups True/False with Justification
We consider two matrices of $M _ { 2 } ( \mathbf { Z } )$ that are $\mathbf { C }$-equivalent. Are they always $\mathbf { Z }$-equivalent? 
We consider two matrices of $M _ { 2 } ( \mathbf { Z } )$ that are $\mathbf { C }$-equivalent. Are they always $\mathbf { Z }$-equivalent?
Paper Questions
QI.1 QI.2 QI.3 QI.4 QI.5 QII.1 QII.2 QII.3 QII.4 QII.5 QIII.1 QIII.2 QIII.3 QIV.1 QIV.2 QIV.3 QV.1 QV.2 QV.3 QV.4