ScalingStacks

\propname 5.1.4 ( [ 43 ] , Lemma 2.1) . [01T2]

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\propname 5.1.4 ([43], Lemma 2.1).

Soient ω1,…,ωs\omega_{1},\dots,\omega_{s} des formes positives (resp. faiblement positives) et posons ω=ω1∧⋯∧ωs\omega=\omega_{1}\wedge\dots\wedge\omega_{s}.

Si les ωj\omega_{j} sont toutes fortement positives, alors ω\omega est fortement positive.

Si au plus une d’entre elle n’est pas fortement positive, alors ω\omega est positive (resp. faiblement positive).

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