Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absence of positive eigenvalues for hard-core N-body systems   We show absence of positive eigenvalues for generalized 2-body hard- core
Schroedinger operators under the condition of bounded strictly convex
obstacles. A scheme for showing absence of positive eigenvalues for generalized
N -body hard-core Schroedinger operators, N \geq 2, is presented. This scheme
involves high energy resolvent estimates, and for N = 2 it is implemented by a
Mourre commutator type method. A particular example is the Helium atom with the
assumption of infinite mass and finite extent nucleus.

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The categories of this paper are: adap-org
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat