A difficult problem about linear algebra.Help

Thread starter tghg
Start date Oct 28, 2006
Tags

Linear

Join the discussion

Registration is free. Ask a follow-up in this thread, or start your own.

1 reply · 3K views

tghg

Thread starter
Oct 28, 2006

A difficult problem about linear algebra.Help!

Suppose that A is a m*n matrix，B is a n*m matrix,and AB is a idempotent matrix.
Please verify that BA is also a idempotent matrix.

Discussion

Physics news on Phys.org

Bringing it all into focus—computational microscope captures 25.2 billion pixels per second across a wide field of view
New quantum encryption method prevents ciphertext from being cloned
Light controls nanoscale 'bubble' domains in a ferroelectric crystal

StatusX

Homework Helper

Oct 29, 2006

Do you know what an idempotent matrix is? Where are you getting stuck?

A difficult problem about linear algebra.Help

Discussion

Hi! Can someone explain about Differential Equations?

Investigating the real roots of a cubic equation

Deriving spatial derivatives

What does "compute Aut(G)" mean?

J_1(x) = (x^2/10)*(J_1(x) + J_3(x)) How to solve?

Insights Revisiting the Velocity-Time Function

Insights Remote Operated Gate Control System

Insights AI Enriched Problem Solving

Insights Thinking Outside The Box Versus Knowing What’s In The Box

Insights Why Entangled Photon-Polarization Qubits Violate Bell’s Inequality

Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect

A difficult problem about linear algebra.Help

Discussion

Similar threads