A polynomial-time algorithm computes fractional claims trades and donations that rescue a creditor without harming the buyer, and NP-hardness is shown for trades of a common debtor's claims under default costs.
Decentralized clearing in financial networks
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Fractional Claims Trades and Donations in Financial Networks
A polynomial-time algorithm computes fractional claims trades and donations that rescue a creditor without harming the buyer, and NP-hardness is shown for trades of a common debtor's claims under default costs.