= Gerard Orriols
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Gerard Orriols coauthored notes on <elliptic partial differential equations> with <André Guerra>. They develop <variational methods>, <maximum principles> and <Schauder estimates>, including how regularity estimates support existence proofs. This brings together energy minimization and pointwise comparison as complementary tools for analyzing solutions.<Lecture notes on Elliptic Partial Differential Equations by André Guerra and Gerard Orriols>[Contents and Sections 1–4]{ref}
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