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Introduction to Galois Theory (Coursera)

A very beautiful classical theory on field extensions of a certain type (Galois extensions) initiated by Galois in the 19th century. Explains, in particular, why it is not possible to solve an equation of degree 5 or more in the same way as we solve quadratic or cubic equations. [...]
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The American Renaissance (

Self Paced
The American Renaissance (
Free Course
As most famously defined by F. O. Matthiessen in his groundbreaking book, The American Renaissance: Art and Expression in the Age of Emerson and Whitman (1941), the “American Renaissance” demarcates a period of tremendous literary activity between the 1830s and 1860s that marked the cultivation, for the first time, [...]
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