In mathematics, homology theory is the axiomatic study of the intuitive geometric idea of homology of cycles on topological spaces.
Read more about Homology Theory: General Idea, Cohomology, Applications, Intersection Theory and Poincaré Duality, Connection With Integration, Axiomatics and Generalised Homology, Homological Algebra and Homology of Other Objects
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“By the “mud-sill” theory it is assumed that labor and education are incompatible; and any practical combination of them impossible. According to that theory, a blind horse upon a tread-mill, is a perfect illustration of what a laborer should be—all the better for being blind, that he could not tread out of place, or kick understandingly.... Free labor insists on universal education.”
—Abraham Lincoln (1809–1865)