72 5.4.2 Mod elisation de l' echantillon, p.74 ,
105 6.2.4.1 Extension a a 2, 105 6.2.4.2 Restriction aux fonctions r, p.110 ,
157 A.3.2 Application a la demi-sph ere, p.158 ,
on peut proc eder dii eremment, en utilisant uniquement des bandes en . En eeet, un noyau situ e e n ( XXY) n'apporte aucune contribution lorsqu'on l' evalue en (xx y) a vec xy quelconque si et seulement s i : 8 xy 2 00 ] s((xx, p.200 ,
quelque soit xy : cos( x ; X ) 2 ; 1 o u c o s ( y ; Y ) 2 ,
noyau s epar e, il est facile de faire ce tirage, puisque les noyaux sont s eparables, et normalis es individuellement. Mais de toute faa con, il est souvent p l u s judicieux d'utiliser ,
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