Background
The mathematics of “linkages” resembles classical geometry but incorporates motion. While imagined movement is commonly used to aid reasoning in geometry, linkagesare explicitly understood as jointed assemblies of rigid objects, and what’s studiedistheir movement relative to each other. Such theory, perfectly suited to application during the Industrial Revolution, begantooccupy mathematicians in the 19th century, soon after the development of modernprecision machining. See here:
Proliferation of mechanical computing devices such as we already discussed was adirect consequence:
https://www.youtube.com/user/MechanicalComputing
https://en.m.wikipedia.org/wiki/Curta
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