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Occam's razor redux: A simple mathematical approach to designing mechanical invisibility cloaks

Metamaterials – engineered materials with properties not found in nature – have led to an astounding range of optical, acoustic, thermodynamic, two-dimensional solid mechanics, and other types of invisibility cloaks that render the cloaked object indistinguishable from the environment around them – but the ability to cloak three-dimensional solid mechanics has proven elusive

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