ScalingStacks

\propname 3.7.2 . [01QA]

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\propname 3.7.2.

Soit VV un espace kk-analytique compact purement de dimension nn. Soit ω\omega une forme de type (n,n)(n,n) à coefficients mesurables sur VV, que l’on suppose tropicale. Soit W,W1W,W_{1} et W2W_{2} trois domaines analytiques compacts de VV.

  1. 1.

    On a

    ∫W1|ω|≤∫W1∪W2|ω|=∫W1|ω|+∫W2|ω|−∫W1∩W2|ω|,\int_{W_{1}}\mathopen{|}{\omega}\mathclose{|}\leq\int_{W_{1}\cup W_{2}}\mathopen{|}{\omega}\mathclose{|}=\int_{W_{1}}\mathopen{|}{\omega}\mathclose{|}+\int_{W_{2}}\mathopen{|}{\omega}\mathclose{|}-\int_{W_{1}\cap W_{2}}\mathopen{|}{\omega}\mathclose{|},
    et​∫W1∪W2ω=∫W1ω+∫W2ω−∫W1∩W2ω\text{et}\;\int_{W_{1}\cup W_{2}}\omega=\int_{W_{1}}\omega+\int_{W_{2}}\omega-\int_{W_{1}\cap W_{2}}\omega

    si ω|W1∪W2\omega|_{W_{1}\cup W_{2}} est intégrable.

  2. 2.

    Supposons que WW contient le support de ω\omega. On a alors ∫W|ω|=∫V|ω|\int_{W}|\omega|=\int_{V}|\omega|, et ∫Wω=∫Vω\int_{W}\omega=\int_{V}\omega si ω\omega est intégrable.

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