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<p>slow until the middle of the century when the <a href="page.php?w=Bj%C3%B6rling_problem">Björling problem</a> was solved using complex methods. The "first golden age" of minimal surfaces began. <a href="page.php?w=Hermann_Schwarz">Schwarz</a> found the solution of the <a href="page.php?w=Plateau_problem">Plateau problem</a> for a regular quadrilateral in 1865 and for a general quadrilateral in 1867 (allowing the construction of his periodic <a href="page.php?w=Schwarz_minimal_surface">surface families</a>) using complex methods. <a href="page.php?w=Weierstrass">Weierstrass</a></p><p>
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