SIAM J. COMPUI. Vol. 4. No. 3. September I97S INTERACTIVE COMPUTATION OF HOMOLOGY OF FINITE PARTIALLY ORDERED SETS* R. BUMBY.t E. COOPER} AND D. LATCH}

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• Abstraction
• Partially ordered set
• Duality
• Hasse diagram
• Graded poset
• Ranked poset
• Order theory
• Mathematics
• Structure