%PDF-1.5 % 1 0 obj > endobj 4 0 obj (Introduction) endobj 5 0 obj > endobj 8 0 obj (The blockchain and branch selection) endobj 9 0 obj > endobj 12 0 obj (Playing catch-up) endobj 13 0 obj > endobj 16 0 obj (Waiting for confirmations) endobj 17 0 obj > endobj 20 0 obj (Graphs and analysis) endobj 21 0 obj > endobj 24 0 obj (Economics of double-spending) endobj 25 0 obj > endobj 28 0 obj (Conclusions) endobj 29 0 obj > endobj 40 0 obj > stream xڍVK6ϯ-v˶r ” U*؃%fӭ[ً}~UR$+%Q:$dRV2lOG׻,N [붳]ki

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