   
 
Préambule
              
            
http://agrint.agreg.org/
            
               
        
            
            
    
http://megamaths.perso.neuf.fr/ann.html
Table des matières
1 Ensembles et logique 4
                                    
                                              
                                           
4 Groupes et géométrie 7
                                            
                                          
                                         
                                       
                                         
3 Algèbre générale 12
                                             
                                           
                                       
                                               
5 Algèbre linéaire sur un corps commutatif 17
                                   
                                      
                                   
                                       
                                          
                                              
                                            
                                            
9 Analyse réelle et complexe 27
                                    
                                        
                                        
                                       
                                            
                                           
                                            
                                     
10 Topologie et analyse fonctionnelle 35
                                        
                              
                                    
                                         
                                      
                                      
12 Calcul diérentiel 43
2 Algorithmique et informatique 44
Bibliographie 45
Chapitre 1
Ensembles et logique
             
               
     
Prérequis.        
1.1 Relations d’équivalence
          
               
            

Dénition.       X  
≡:X×X−→ {,}
(a,b)−→ a≡b
    
∀a∈X,∀b∈X,∀c∈X,a≡b∧b≡c⇒a≡c
∀a∈X,∀b∈X,a≡b⇒b≡a
∀a∈X,a≡a
Dénition.     a∈X  a={b∈X:b≡a}
      X/≡
Proposition.    X   
a∈Xa=X
a∩b= ⇒ a=b
          
Exemple.

f:X→Y
    
x≡y⇔f(x) = f(y)

X
     
f
  
≡
   
 X   x∈X→ x∈X/≡     
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