Catenary conundrum

Catenary conundrum. Photo of chain model of catenary arches often used by architect Antoni Gaudi, on display in the attic of Casa Mila ("La Pedrera"), Barcelona, Spain.

Catenary conundrum. Photo of chain model of catenary arches often used by architect Antoni Gaudi, on display in the attic of Casa Mila (“La Pedrera”), Barcelona, Spain.

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