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Loi des mailles, noeuds


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@syncitiotrophoblastecoucou, alors ici  N=2 , car les "2 noeuds " du haut peuvent être reliés en 1 seul. Pareil pour "ceux" qui sont en bas 

Tu peux voir ça grâce à la définition : 1 noeud = intersection de 3 branches, or 1 fil tout seul n'est pas une branche (il faut au moins 1 dipôle). 

Ou alors en te faisant un schéma équivalent : 1172597478_Capturedcran2022-03-1420_18_42.png.79874fce139dc8fa31165e11dfbd6b7c.png

 

 

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